- v. To move wildly or violently, without accomplishing anything
useful. Swapping systems which are overloaded waste most of their
time moving pages into and out of core (rather than performing
useful computation), and are therefore said to thrash.
- n.1.Interval of time; basic clock time on the computer.
Typically 1/60 second. See JIFFY.
2. In simulations, the discrete
unit of time that passes "between" iterations of the simulation
mechanism. In AI applications, this amount of time is often left
unspecified, since the only constraint of interest is that caused
things happen after their causes. This sort of AI simulation is
often pejoratively referred to as "tick-tick-tick" simulation,
especially when the issue of simultaneity of events with long,
independent chains of causes is handwaved.
- TIME T
- n.1. An unspecified but usually well-understood time, often
used in conjunction with a later time T+1. "We'll meet on campus
at time T or at Louie's at time T+1."
2. SINCE (OR AT) TIME T
EQUALS MINUS INFINITY: A long time ago; for as long as anyone can
remember; at the time that some particular frob was first designed.
- v.i. To work; to study. See HACK (def #9).
- 1.n. A program interrupt, usually used specifically to refer to
an interrupt caused by some illegal action taking place in the user
program. In most cases the system monitor performs some action
related to the nature of the illegality, then returns control to
the program. See UUO.
2.v. To cause a trap. "These instructions
trap to the monitor." Also used transitively to indicate the cause
of the trap. "The monitor traps all input/output instructions."
- (titty) n. Terminal of the teletype variety, characterized by a
noisy mechanical printer, a very limited character set, and poor
print quality. Usage: antiquated (like the TTY's themselves).
Sometimes used to refer to any terminal at all; sometimes used
to refer to the particular terminal controlling a job.
- v. To change slightly, usually in reference to a value. Also
used synonymously with TWIDDLE. See FROBNICATE and FUDGE FACTOR.
- n. The TOPS-20 operating system by DEC. So named because
TOPS-10 was a typically crufty DEC operating system for the PDP-10.
BBN developed their own system, called TENEX (TEN EXecutive), and
in creating TOPS-20 for the DEC-20 DEC copied TENEX and adapted it
for the 20. Usage: DEC people cringe when they hear TOPS-20
referred to as "Twenex", but the term seems to be catching on
nevertheless. Release 3 of TOPS-20 is sufficiently different from
release 1 that some (not all) hackers have stopped calling it
TWENEX, though the written abbreviation "20x" is still used.