AMSTRAD CPC464 User Manual page 218

Stream
The route used for the output from the computer. eg the screen, the printer, or the
cassette.
String
A type of data comprising an assortment of characters that may not be treated as a
numeric variable. It may be purely numeric, but it is not treated at such unless
specifically converted to a corresponding numeric variable by the appropiate command.
Structured programming
A logical and premeditated programming technique that results in programs that, flow
from'top to bottom', with clearly described steps.
Subroutine
See routine.
Syntax error
When the rules of the program are broken by the incorrect use of keywords and
variables, BASIC will prompt the user with this message. See Appendix VIII.
Terminal
A keyboard input device, with either a VDU screen or teletype typewriter output
system.
Truncated
A number or string that has been shortened by removal of leading or trailing
characters. Where intentional the process may involve rounding the value. Where
unintentional, the extra characters are simply discarded to enable the number or string
to fit the available space.
Truthtable
The results of a logical operation are either'true' or 'false'. The computer interprets
these as being either 1 or 0, and the truth table lists the possible results of a logical
operation (IF A> B THEN C) accordingly.
UM
User defined keys. The CPC464 has up to 32 keys which may be redefined to perform a
variety of tasks, including strings of up to 32 characters.
Unsignednumber
A number with no prefix to signify whether its value is positive or negative.
utility
Any complete program used to perform a common operation, such as sorting data or
copying files.
Variable
An item included in a computer program that can be identified by name, but whose