:slash: n. Common name for the slant (`/', ASCII 0101111) character. See {ASCII} for other synonyms.
:sleep: vi. 1. [techspeak] On a timesharing system, a process that relinquishes its claim on the scheduler until some given event occurs or a specified time delay elapses is said to `go to sleep'. 2. In jargon, used very similarly to v. {block}; also in `sleep on', syn. with `block on'. Often used to indicate that the speaker has relinquished a demand for resources until some (possibly unspecified) external event: "They can't get the fix I've been asking for into the next release, so I'm going to sleep on it until the release, then start hassling them again."
:slim: n. A small, derivative change (e.g., to code).
:slop: n. 1. A one-sided {fudge factor}, that is, an allowance for error but in only one of two directions. For example, if you need a piece of wire 10 feet long and have to guess when you cut it, you make very sure to cut it too long, by a large amount if necessary, rather than too short by even a little bit, because you can always cut off the slop but you can't paste it back on again. When discrete quantities are involved, slop is often introduced to avoid the possibility of being on the losing side of a {fencepost error}. 2. The percentage of `extra' code generated by a compiler over the size of equivalent assembler code produced by {hand-hacking}; i.e., the space (or maybe time) you lose because you didn't do it yourself. This number is often used as a measure of the goodness of a compiler; slop below 5% is very good, and 10% is usually acceptable. With modern compiler technology, esp. on RISC machines, the compiler's slop may actually be *negative*; that is, humans may be unable to generate code as good. This is one of the reasons assembler programming is no longer common.
:slopsucker: /slop'suhk-r/ n. A lowest-priority task that must wait around until everything else has `had its fill' of machine resources. Only when the machine would otherwise be idle is the task allowed to `suck up the slop'. Also called a `hungry puppy' or `bottom feeder'. One common variety of slopsucker hunts for large prime numbers. Compare {background}.
:slurp: vt. To read a large data file entirely into {core} before working on it. This may be contrasted with the strategy of reading a small piece at a time, processing it, and then reading the next piece. "This program slurps in a 1K-by-1K matrix and does an FFT." See also {sponge}.
:smart: adj. Said of a program that does the {Right Thing} in a wide variety of complicated circumstances. There is a difference between calling a program smart and calling it intelligent; in particular, there do not exist any intelligent programs (yet —- see {AI-complete}). Compare {robust} (smart programs can be {brittle}).
:smart terminal: n. 1. A terminal that has enough computing capability to render graphics or to offload some kind of front-end processing from the computer it talks to. The development of workstations and personal computers has made this term and the product it describes semi-obsolescent, but one may still hear variants of the phrase `act like a smart terminal' used to describe the behavior of workstations or PCs with respect to programs that execute almost entirely out of a remote {server}'s storage, using said devices as displays. Compare {glass tty}. 2. obs. Any terminal with an addressable cursor; the opposite of a {glass tty}. Today, a terminal with merely an addressable cursor, but with none of the more-powerful features mentioned in sense 1, is called a {dumb terminal}.
There is a classic quote from Rob Pike (inventor of the {blit} terminal): "A smart terminal is not a smart*ass* terminal, but rather a terminal you can educate." This illustrates a common design problem: The attempt to make peripherals (or anything else) intelligent sometimes results in finicky, rigid `special features' that become just so much dead weight if you try to use the device in any way the designer didn't anticipate. Flexibility and programmability, on the other hand, are *really* smart. Compare {hook}.
:smash case: vi. To lose or obliterate the uppercase/lowercase distinction in text input. "MS-DOS will automatically smash case in the names of all the files you create." Compare {fold case}.