pixel
A single point or 'dot' on the calculator display.
PLT
TI's acronym for Personal Learning Tool, which they use to describe the Voyage 200. Although the
Voyage 200 is an updated TI-92 Plus, TI does not specifically call it a graphing calculator. See also
Voyage 200 and v200.
port, porting (software)
Porting is the process of rewriting a program to run on a calculator other than that which it was
originally intended. For example, TI-83 programs cannot run on the TI-89. Ports of popular programs
are common.
post
A discussion group message.
Pretty print
The graphical method of displaying expressions in which the expression elements are shown as they
are usually written by hand or set in type. For example, fractions are shown with the numerator above
the denominator, and exponents are shown slightly above the other elements.
program
A routine which has zero, one or more arguments. Programs cannot return results to calling routines or
to the home screen. See also command and function.
program archive
A large collection of calculator programs on the internet, either on a web site or FTP site. Used to
download other people's programs, and to distribute your own.
program I/O screen
The screen on which programs display text and expressions. One of several calculator display
screens.
QWERTY
Alpha keyboard as used on the TI-92 Plus and the Voyage 200. So named because of the
arrangement of the letters QWERTY on the top row.
RAM
One of two types of memory in the calculator; also see flash. RAM is an acronym for random access
memory. Variables and programs are stored in RAM, unless you store them into flash memory by
archiving them. Variables can be quickly stored into RAM and read from RAM. The contents of RAM
can be lost if the main batteries are removed and the RAM lithium back-up battery is discharged.
Usually, programs can only run in RAM. An archived program (in the flash memory) is first copied to
RAM before execution. However, flash applications are executed directly from flash memory.
reserved function name
The TI-89 / TI-92 Plus reserve some names for system variables and reserved function names. These
names are specified in the TI-89 / TI-92 Plus Guidebook, in Appendix B. You cannot use these names
for your own variables.
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