Epson 1500 - Manual (Page 252)

buffer
See memory.
A unit of information consisting of eight bits. A byte usually
corresponds to one character or code.
cache
The area of memory that stores internally generated fonts.
character set
A collection of letters, numbers, and symbols.
character spacing
Refers to two methods for horizontal character placement:
fixed-pitch and proportional spacing.
characters per inch (cpi)
A measure of the size of fixed-pitch text characters.
control codes
Special codes used to control printer functions such as
sounding the beeper and performing a carriage return or line
feed.
cpi
See characters per inch.
data dump mode
See hex dump mode.
GL-2 Glossary