The TI–83 is presented first. This calculator has the fewest options and therefore takes only a few screen shots to describe.

The TI–83 Plus is presented second. This calculator also has few options but the TI–83 Plus implemented the archive memory and we will pay an extra little bit of attention to that.

The TI–84 Plus, in all of its renditions (includng for the newest one, the color version), differ depending upon the software installed on the calculator. For the non-color models we will look at two different versions of that software, version 2.43 and 2.55 MP, the latter being the most recent available for those calculators. We need to look at the two versions because the earlier one is amost identical to the software on the TI–83 Plus, but the newer version has many more options and features. During this discussion we will look at the settings that should be used to "dumb down" the recent software so that the calculator behaves as a TI–83 Plus.

The newest TI–84 Plus C calculator has new software, version 4.0, and a new screen with more resolution and color. You can "dumb down" this version to behave somewhat like the old TI–83 Plus, but you cannot make the screen look just like that of the older calculator. This inability to mimic the older calculator means that students with the new calculator will have to look for similarities, not identical images, between their screens and published screen shot taken from the older calculators.

TI 83
Figure 1	Pressing the key sequence on the TI–83 brings up the screen shown in Figure 1. There is really not much of concern on this screen. If, at some point, there are too many programs on the calculator, or too many lists on the calculator, then we can use the option "Delete..." to delete certain programs or lists. We can find out how much memory is available, and how much memory is allocated for different items, by selecting the first option, Check RAM... We can select this in one of two ways. First, because it is item 1, we can just press the key. Alternatively, because that option is currently highlighted, we could just press the key. Either one will take us to a screen that looks like that shown in Figure 2.
Figure 2	The display in Figure 2 has values that are unique to the TI 83 calculator used to generate that image, and unique for the state of the calculator at the moment that the image was taken. We can see that the particular calculator has 18,199 bytes of memory free at this time. For the purposes of the Math 160 class, having 4,000 or more bytes free should be sufficient to run any programs or generate any data that we will be asked to do. The screen also shows that the allocated memory amounts to 240 bytes for some numeric variables, 998 bytes for some list variables, 248 bytes for some Y-Variables, and 7,666 bytes for some stored programs. As a demonstration, we will look at the stored programs and delete one of them. To do this we want to return to the MEMORY screen by using the same key sequence we used before, .
Figure 3	In Figure3 we have not only returned to the MEMORY screen, we have used the key to move the highlight to the second option, Delete... This is the option we will use to get the calculator to delete a program. We will press the key to have the calculator perform that option and move to Figure 4.
Figure 4	Figure 4 offers us different selections of things we can delete. We have used the key a number of times to move the highlight to the seventh option, Prgm..., the option used to display a list of the programs stored on the calculator and to allow us to delete a program from the calculator. We press to have the calculator perform that option.
Figure 5	The display in Figure 5 shows us the list of the programs currently loaded onto the calculator. In addition, the list gives us the size, in bytes, of each program. The COLLATE2 program uses 1,291 bytes, whereas the COLLATE3 program uses 1,074 bytes. We have used the key to highlight the COLLATE3 program. Now, to delete the program from the calculator we just need to press . WARNING: There is no "undo" to this action. On the TI–83 deleting a program completely removes the program from the calculator. There are three ways to reload the program: you could type it in again (known as the bad way), you could transfer the program from another TI–83 or 83 Plus or 84 Plus calculator, or you could transfer the program from a computer to the calculator.
Figure 6	Having deleted the COLLATE3 program in Figure 5, we now see that the calculator list of programs is missing the COLLATE3 program. We also note that the GNRDN4 program is currently highlighted. Were you to accidentally hit the enter key at this point you would delete that program too. We want to get out of this screen. In this case we would actually like to return to the MEMORY screen, so we can press the key sequence to take us to Figure 7.
Figure 7	We have seen this screen before. We want to check our memory allocation. Therefore, we press to select the first option, taking us to the screen shown in Figure 8.
Figure 8	This is the updated information about the memory allocation on the calculator now that we have deleted COLLATE3. In particular, comparing Figure 8 with Figure 2, we have more available memory (now we have 19, 273 bytes of available memory), and we have less memory allocated for stored programs (we are down to 6,592 bytes for this). We can get out of this screen, and return to just using the calculator via the key sequence .
Figure 9	Once we are back in standard calculator mode, we can hit the key on the TI–83 to bring up a screen similar to the screen in Figure 9. For the Math 160 class we will be quite satisfied to have all of the values set on the leftmost option, as shown in Figure 9. Note that later in the Math 160 course there is a program that modifies the setting of the second line of this screen to set the number of decimal digits displayed to 3 rather than to let that value Float, a setting that causes values to appear with as many decimal digits, up to the limits of the calculator, as is needed. After you are finished with that program you would need to return to this screen to change the setting back to the Float option.
TI 83 Plus
Figure 10	Pressing the key sequence on the TI–83 Plus brings up the screen shown in Figure 10. We notice that there are special options on this screen to Archive and to Unarchive specific items. (Rather than use these items we will demonstrate moving programs to and from the Archive memory in a different manner. Figures 14 through 17 will do this.) The memory on the TI–83 Plus is segmented into two types of memory. Part of the total memory is reserved for programs and entities, such as variables, lists, and matrices, that can be accessed directly. This is the working memory. The rest of the memory on the TI–83 Plus is set aside to hold any such entities in an archived state. Entities, be they programs or lists or matrices, or other items, that are in the Archive are not available to use in doing computations or in running programs. The Archive acts as an off-line storage place to hold items. We would move items to the archive if we want to free up space in the working memory without really losing the item. It is important to note that an item is either in working memory or in the archive; it cannot be in both at the same time. Before we go further into the use of the working and the archived memory, we will look at the first option, About. In Figure 10, the highlight is on that option so we can just press the to move to Figure 11.
Figure 11	This screen tells us that this is indeed a TI–83 Plus calculator, that it is running version 1.19 of the operating system software, and we learn the product number and the ID number for this calculator. Finally, at the bottom of the screen we see that we are directed to the web page education.ti.com for help. Depending upon the age of the calculator, there are a number of different versions of the operating system software for the TI–83 Plus. All of them behave the same way as far as this dicussion goes. We want to go back to look at more items on the MEMORY screen. Therefore, we press the key sequence to return to that screen, as shown in Figure 12.
Figure 12	We have not only returned to the MEMORY screen, we have used the key to move the highlight to the second option, namely, to Mem Mgmt/Del... We can have the calculator perform that option by pressing the key, taking us to Figure 13.
Figure 13	Figure 13 gives two pieces of information and then a list of options for the next action. The information is the amount of RAM memory, that is the amount of working memory, that is free and the amount of ARChive memory that is free to hold additional entities. The free working memory is called RAM FREE. On the calculator used to generate these images, at the moment of taking this image, there were 9,710 bytes of working memory free and 90,916 bytes of archive memory free. For the purposes of the Math 160 class, having 4,000 or more bytes free should be sufficient to run any programs or generate any data that we will be asked to do.
Figure 14	To demonstrate the use of archive memory, we will move a program, COLLATE2, from working memory to archive memory. To get to the list of programs we have used the key to move the highlight down to the 7th option, Prgm... Once there we just press the key to move to Figure 15. [Note that instead of moving the highlight, we could have just pressed the key to perform the 7th option. This is true even if the 7th option is not visible, as was the case in Figure 13.]
Figure 15	Figure 15 continues to display the amount of free working memory and the amount of free archive memory. In addition, Figure 15 starts an alphabetic list of the programs that are installed on this calculator. Each program is given with its size, that is, with the number of bytes needed to store the program. Thus, CALCPSD uses 386 bytes, CALCVSDF uses 459 bytes, COLLATE2 uses 1,176 bytes, and so on. Programs that are in working memory are listed without an asterisk before the program name; programs that reside in the archive are listed with an asterisk before the program name. All of the programs in shown in Figure 15 are in working memory. Our plan is to move COLLATE2 from working memory to the archive memory. To do this we will have to move the highlight to point to the COLLATE2 program.
Figure 16	Using the key, we have moved the highlight to the desired COLLATE 2 program. To move the highlighted program, COLLATE2, to the archive memory, and to move to Figure 17, we just press the key.
Figure 17	Now the COLLATE2 program name is given with a leading asterisk. The program has been moved to the archive space. In fact, we can see this because the amount of free working memory is now reported to have increased to 10,871 bytes while the amount of free archive memory has decreased to 89,737 bytes. Remember that an entity in the archive space is held in the calculator but is not available for us to use in a computation. As it turns out, we want COLLATE2 back in the working memory. Becuase it is the highlighted program in Figure 17 we can move it back to the working memory, and move to Figure 17a, by pressing the key.
Figure 17a	Moving a program from working memory to the archive frees up space in working memory while keeping a copy of the program on the calculator. The copy in the archive is not available to use directly, but it is available to be restored to working memory. On the other hand we can simply delete a program from the calculator. This is dangerous because once removed the program is really gone. To restore the program we would need to re-enter it, or transfer it from another calculator, or transfer it from a computer. In Figure 17a the program COLLATE2 is still highlighted. If we press the at this point we will start the process of deleting the program from the calculator.
Figure 17b	The TI–83 Plus is cautious enough about deleting an entity that it responds with the screen shown in Figure 17b. If we are not serious about removing the program then we can just take the No option. If we really want to remove the program then we press the key to move the highlight to the Yes option, as in Figure 17c.
Figure 17c	Here the Yes option is highlighted and we press to have the calculator perform that option and move to Figure 17d.
Figure 17d	In Figure 17d we note that COLLATE2 is no longer on the calculator. Furthermore, the free working memory has now increased to 10,886 bytes. Note that the amount of free archive memory remains unchanged. After all, we deleted the program from working memory and we did nothing to the archive memory. We can get out of this screen, and return to just using the calculator via the key sequence .
Figure 18	Once we are back in standard calculator mode, we can hit the key on the TI–83 Plus to bring up a screen similar to the screen in Figure 18. For the Math 160 class we will be quite satisfied to have all of the values set on the leftmost option, as shown in Figure 18. Note that later in the Math 160 course there is a program that modifies the setting of the second line of this screen to set the number of decimal digits displayed to 3 rather than to let that value Float, a setting that causes values to appear with as many decimal digits, up to the limits of the calculator, as is needed. After you are finished with that program you would need to return to this screen to change the setting back to the Float option.
TI 84 Plus   (not the color version)
Figure 19	Pressing the key sequence on the TI–84 brings up the screen shown in Figure 19. This is identical to the screen shown in Figure 10 for the TI–83 Plus. Just as with the TI–83 Plus we notice that there are special options on this screen to Archive and to Unarchive specific items. (Rather than use these items we will demonstrate moving programs to and from the Archive memory in a different manner. Figures 23 through 27 will do this.) The memory on the TI–84 Plus is segmented into two types of memory. Part of the total memory is reserved for programs and entities, such as variables, lists, and matrices, that can be accessed directly. This is the working memory. The rest of the memory on the TI–84 Plus is set aside to hold any such entities in an archived state. Entities, be they programs or lists or matrices, or other items, that are in the Archive are not available to use in doing computations or in running programs. The Archive acts as an off-line storage place to hold items. We would move items to the archive if we want to free up space in the working memory without really losing the item. It is important to note that an item is either in working memory or in the archive; it cannot be in both at the same time. Before we go further into the use of the working and the archived memory, we will look at the first option, About. In Figure 19, the highlight is on that option so we can just press the to move to Figure 20.
Figure 20	This screen tells us that this is indeed a TI–84 Plus Silver Edition calculator, that it is running version 2.43 of the operating system software, and we learn the product number and the ID number for this calculator. Finally, at the bottom of the screen we see that we are directed to the web page education.ti.com for help. Depending upon the age of the calculator, and upon whether or not the software on the calculator has been updated, there are a number of different versions of the operating system software for the TI–84 Plus. All of them behave the same way as far as the first part of this discussion goes. The big change will not become apparent until Figure 31. We want to go back to look at more items on the MEMORY screen. Therefore, we press the key sequence to return to that screen, as shown in Figure 21.
Figure 21	We have not only returned to the MEMORY screen, we have used the key to move the highlight to the second option, namely, to Mem Mgmt/Del... We can have the calculator perform that option by pressing the key, taking us to Figure 22.
Figure 22	Figure 22 gives two pieces of information and then a list of options for the next action. The information is the amount of RAM memory, that is the amount of working memory, that is free and the amount of ARChive memory that is free to hold additional entities. The free working memory is called RAM FREE. On the calculator used to generate these images, at the moment of taking this image, there were 10,813 bytes of working memory free and 1,532K bytes (essentially 1.5 megabytes) of archive memory free. For the purposes of the Math 160 class, having 4,000 or more bytes free should be sufficient to run any programs or generate any data that we will be asked to do.
Figure 23	To demonstrate the use of archive memory, we will move a program, COLLATE2, from working memory to archive memory. To get to the list of programs we have used the key to move the highlight down to the 7th option, Prgm... Once there we just press the key to move to Figure 15. [Note that instead of moving the highlight, we could have just pressed the key to perform the 7th option. This is true even if the 7th option is not visible, as was the case in Figure 22.]
Figure 24	Figure 24 continues to display the amount of free working memory and the amount of free archive memory. In addition, Figure 24 starts an alphabetic list of the programs that are installed on this calculator. Each program is given with its size, that is, with the number of bytes needed to store the program. Thus, CALCPSD uses 386 bytes, CALCVSDF uses 459 bytes, COLLATE2 uses 1,176 bytes, and so on. Programs that are in working memory are listed without an asterisk before the program name; programs that reside in the archive are listed with an asterisk before the program name. Therefore, CALCPSD is currently in the archive, while the rest of the programs shown in Figure 24 are in working memory. Our plan is to move COLLATE2 from working memory to the archive memory. To do this we will have to move the highlight to point to the COLLATE2 program.
Figure 25	To change Figure 24 to Figure 25 we pressed the key to move the highlight to point to COLLATE2. Once the program is highlighted, we press the key to move that program from the working memory to the archive memory; this is shown in Figure 26.
Figure 26	The COLLATE2 program now has an asterisk before it, the working memory has increased to 11,974 bytes and the archive memory has decreased to 1,521 kilobytes. There is so much archive memory on this calculator that the change is hardly noticeable. Press the again and the COLLATE2 program moves back to working memory as shown in Figure 27.
Figure 27	The TI–84 Plus calculator has so much archive memory that there should be little or no need to ever remove a program from the calculator. However, if you wanted to remove the program, you would use this same screen. With the highlight pointing to COLLATE2 we simply press the key to start the process of deleting that program.
Figure 28	The TI–84 Plus is cautious enough about deleting an entity that it responds with the screen shown in Figure 28. If we are not serious about removing the program then we can just take the No option. If we really want to remove the program then we press the key to move the highlight to the Yes option, as in Figure 29.
Figure 29	Here the Yes option is highlighted and we press to have the calculator perform that option and move to Figure 30.
Figure 30	In Figure 30 we note that COLLATE2 is no longer on the calculator. Furthermore, the free working memory has now increased to 11,989 bytes. Note that the amount of free archive memory remains unchanged. After all, we deleted the program from working memory and we did nothing to the archive memory. We can get out of this screen, and return to just using the calculator via the key sequence .
Figure 31 Specifically for Version 2.43	Once we are back in standard calculator mode, we can hit the key on the TI–83 Plus to bring up a screen similar to the screen in Figure 31. [Attention: the screen shown here is from the calculator that we have been using to generate these images. In particular, that calculator was running version 2.43 of the operating system software, as was shown in Figure 20. The newer version of the software, version 2.55 MP produces a different screen. Move to Figure 34 to see that version.] For the Math 160 class we will be quite satisfied to have all of the values set on the leftmost option, as shown in Figure 31. It is somewhat interesting to note that the format of the display has changed slightly from that used in the earlier TI calculators, but that the only new feature is the inclusion of a system clock. Note that later in the Math 160 course there is a program that modifies the setting of the second line of this screen to set the number of decimal digits displayed to 3 rather than to let that value Float, a setting that causes values to appear with as many decimal digits, up to the limits of the calculator, as is needed. After you are finished with that program you would need to return to this screen to change the setting back to the Float option.
Special material on the TI 84 Plus running Version 2.55 MP
Figure 32 For Version 2.55 MP	One of the advances with the TI–84 Plus is the ability of the calculator to accept a new version of the operating system software. This means that any TI–84 Plus can be upgraded, by the user, to the newest version of the operating system available for the non-color versions of the calculator. At the time that this page was written, the most advanced version, for the non-color calcuators, of that operating system is 2.55 MP. This version has some new and powerful features. To see this we will switch to a calculator that has that software installed. Press to move to the MEMORY page. Then press to perform the ABOUT option.
Figure 33 For Version 2.55 MP	Here we confirm that the current calculator being used has the 2.55 MP operating system software on it. We exit this screen via the key sequence.
Figure 34 For Version 2.55 MP	When we move to the MODE display, via the key, we start to see the change in the options and capabilities of the new operating system software. Comparing this screen to the screen, shown in Figure 31 for the older software, we see that the clock has been replaced by a NEXT line at the bottom of the screen. This is the only change that is obvious at this time. However, if we use the key to move to that NEXT option, the screen changes to that shown in Figure 35.
Figure 35 For Version 2.55 MP	On this new second page of the MODE screen we find the clock at the bottom, along with a whole new set of options. The first option allows the user to decide if the calculator should use a new feature, called MATHPRINT, to format the display of some symbols on the screen. For example, looking at two expressions, the square root of 275 and the fraction 5/8 expressed as a fraction, the "CLASSIC" display would have been: whereas the "MATHPRINT" version displays as . It may seem silly to forego the improvement in the display available through the "MATHPRINT" option. However, in writing all of the support pages for the course one needs to recognize that there are still students using the older calculators or using the older versions of the operating system on the newer calculators. Those students do not have the option to use the MATHPRINT feature because it is not on their calculator. Therefore, it is just easier to just assume that everyone is using the "CLASSIC" display. To be consistent with the other calculators, use the key to move the blinking indicator to the CLASSIC option, then press the key to change the option to the CLASSIC mode. This has been done on this calculator as shown in Figure 36.
Figure 36 For Version 2.55 MP	We can use the key to move to the fifth option on the page, STATDIAGNOSTICS. The default, shown in Figure 36, is to have this turned off. As it turns out, for the Math 160 class, there is only one place where we need this turned ON, but there is no harm in having it on all the time. We can turn STATDIAGNOSTICS "ON" by using the key to move the blinking indicator to the ON option, then press to set the option to "ON".
Figure 37 For Version 2.55 MP	In Figure 37 we see that the changes have been made. Now we use the key to move the blinking option to the next line, the STATWIZARDS option. By default, this option is "ON", as shown in Figure 37. The STATWIZARDS feature is interesting, but, as before, to have this calculator function as do the earlier calculators we will turn this option "OFF". To do this use the key to move the blinking indicator to the "OFF" value and then press the key to select that setting. The result is shown in Figure 38.
Figure 38 For Version 2.55 MP	Figure 38 shows the preferred settings for the options on the TI–84 Plus running operating system version 2.55 for our section of the Math 160 class. The key sequence exits this option page and returns the calculator to its normal screen.

TI–84 Plus C   (the color version)
Figure 39 For the color TI–84 Plus C These images have been reduced to save space for those who print out these pages.	Figure 39 shows the splash screen that comes up on a new TI–84 Plus C calculator. The difference in the quality of the display between this calculator and the earlier versions presented above should be obvious. Not only do we have color, the resolution of the screen is much higher than was that of the earlier versions. From the TI–83 (introduced in 1996) through the currently sold TI–83 Plus (introduced in 1999), the TI–84 Plus (introduced in 2004 and including the Silver Edition of the same) the TI screens have had a resolution of 95 pixels across the screen and 63 pixels top to bottom of the screen. The TI–84 Plus C (introduced in 2013) produces graphs with 265 pixels across the graph and 165 pixels from the top to the bottom of the graph. Some note should be made here that the screen on the TI–84 Plus C calculator actually has a resolution of about 320 by 240 pixels but that the graphing area is only 265 by 165. Furthermore, that screen resolution is significantly lower than the resolution on most current smart phones. Given the better resolution on its screen, the TI–84 Plus C expands its main display (the non-graphing disply) to hold 26 characters across the screen and ten lines of characters down the screen. These values are different from the earlier versions of the calculator that only had 16 characters across the screen and 8 lines of text on the screen. The splash screen shown in Figure 39 explains two new features of the TI–84 Plus C calculator. In particular, there are now some shortcut menus, accessed by using the ALPHA key and then one of the F1 through F4 keys. Also, when you are using the menus, pressing the + key will often bring up a small help screen showing the appropriate syntax for that command.
Figure 40 For color TI–84 Plus C	Pressing the key sequence on the TI–84 Plus C brings up the screen shown in Figure 40. This is similar to the screen shown in Figure 10 for the TI–83 Plus. The difference is that this screen has more available display area. Therefore, option 2 is expanded and option 8 is displayed on the screen. Just as with the TI–83 Plus we notice that there are special options on this screen to Archive and to Unarchive specific items. The memory on the TI–84 Plus C is segmented into two types of memory. Part of the total memory is reserved for programs and entities, such as variables, lists, and matrices, that can be accessed directly. This is the working memory. The rest of the memory on the TI–84 Plus C is set aside to hold any such entities in an archived state. Entities, be they programs or lists or matrices, or other items, that are in the Archive are not available to use in doing computations or in running programs. The Archive acts as an off-line storage place to hold items. We would move items to the archive if we want to free up space in the working memory without really losing the item. It is important to note that an item is either in working memory or in the archive; it cannot be in both at the same time. Before we go further into the use of the working and the archived memory, we will look at the first option, About. In Figure 40, the highlight is on that option so we can just press the to move to Figure 41.
Figure 41 For the color TI–84 Plus C	This screen tells us that this is indeed a TI–84 Plus C Silver Edition calculator, that it is running version 4.0 of the operating system software, and we learn the product number and the ID number for this calculator. Finally, at the bottom of the screen we see that we are directed to the web page education.ti.com for help. We want to go back to look at more items on the MEMORY screen. Therefore, we press the key sequence to return to that screen, as shown in Figure 42.
Figure 42 For the color TI–84 Plus C	We have not only returned to the MEMORY screen, we have used the key to move the highlight to the second option, namely, to Mem Management/Delete... We can have the calculator perform that option by pressing the key, taking us to Figure 43.
Figure 43 For color TI–84 Plus C	Figure 43 gives two pieces of information and then a list of options for the next action. The information is the amount of RAM memory, that is the amount of working memory, that is free and the amount of ARChive memory that is free to hold additional entities. The free working memory is called RAM FREE. On the calculator used to generate these images, at the moment of taking this image, there were 8,143 bytes of working memory free and 3,391K bytes (essentially 3.4 megabytes) of archive memory free. For the purposes of the Math 160 class, having 4,000 or more bytes free should be sufficient to run any programs or generate any data that we will be asked to do. To demonstrate the use of archive memory, we will move a program, COLLATE2, from working memory to archive memory. To get to the list of programs we have used the key to move the highlight down to the 7th option, Prgm... Once there, we just press the key to move to Figure 44. [Note that instead of moving the highlight, we could have just pressed the key to perform the 7th option. This is true even if the 7th option is not visible.]
Figure 44 For the color TI–84 Plus C	Figure 44 continues to display the amount of free working memory and the amount of free archive memory. In addition, Figure 44 starts an alphabetic list of the programs that are installed on this calculator. Each program is given with its size, that is, with the number of bytes needed to store the program. Thus, CALCPSD uses 386 bytes, CALCVSDF uses 459 bytes, COLLATE2 uses 1,294 bytes, and so on. Programs that are in working memory are listed without an asterisk before the program name; programs that reside in the archive are listed with an asterisk before the program name. Therefore, CALCPSD is currently in the archive, while the rest of the programs shown in Figure 44 are in working memory. Our plan is to move COLLATE2 from working memory to the archive memory. To do this we will have to move the highlight to point to the COLLATE2 program.
Figure 45 For the color TI–84 Plus C	To change Figure 44 to Figure 45 we pressed the key to move the highlight to point to COLLATE2. Once the program is highlighted, we press the key to move that program from the working memory to the archive memory; this is shown in Figure 46.
Figure 46 For color TI–84 Plus C	The COLLATE2 program now has an asterisk before it, the working memory has increased to 9,422 bytes and the archive memory has decreased to 3,390 kilobytes. There is so much archive memory on this calculator that the change is hardly noticeable. Press the again and the COLLATE2 program moves back to working memory as shown in Figure 47.
Figure 47 For the color TI–84 Plus C	The TI–84 Plus–C calculator has so much archive memory that there should be little or no need to ever remove a program from the calculator. However, if you wanted to remove the program, you would use this same screen. With the highlight pointing to COLLATE2 we simply press the key to start the process of deleting that program.
Figure 48 For the color TI–84 Plus C	The TI–84 Plus C is cautious enough about deleting an entity that it responds with the screen shown in Figure 48. If we are not serious about removing the program then we can just take the No option. If we really want to remove the program then we press the key to move the highlight to the Yes option, as in Figure 49.
Figure 49 For color TI–84 Plus C	Here the Yes option is highlighted and we press to have the calculator perform that option and move to Figure 50.
Figure 50 For the color TI–84 Plus C	In Figure 50 we note that COLLATE2 is no longer on the calculator. Furthermore, the free working memory has now increased to 9,437 bytes. Note that the amount of free archive memory remains unchanged. After all, we deleted the program from working memory and we did nothing to the archive memory. We can get out of this screen, and return to just using the calculator via the key sequence .
Figure 51 For the color TI–84 Plus C	When we move to the MODE display, via the key, we see that the options are the same as they are on the 2.55MP version of the software on the TI–84 Plus, except that with the better resolution of the TI–84 Plus C screen all of the options are displayed on one screen. The screen shown in Figure 51 has the options set the same way we set them back in Figures 36 through 38.