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(operating system)
To move a program from fast-access memory to a slow-access memory ("swap out"), or vice versa ("swap in"). The term often refers specifically to the use of a hard disk (or a swap file) as virtual memory or "swap space".

When a program is to be executed, possibly as determined by a scheduler, it is swapped into core for processing; when it can no longer continue executing for some reason, or the scheduler decides its time slice has expired, it is swapped out again.

This contrasts with "paging" systems in which only parts of a program's memory is transfered.

SWAP (severe weather avoidance plan)

An approved plan to minimize the effect of severe adverse weather to traffic flows in affected terminal and/or ARTCC (air traffic control center) areas. This plan is put into operation when flight through an airspace is either not possible or is difficult. Such a plan should cause minimum disruption.
References in periodicals archive ?
Swappers get a half-hour at the start to peruse others' wares.
First, if you are not on a gay-home exchange site, come out first thing to potential swappers.
And if they can make that argument before the first suits go to trial sometime in 2006, the recording biz could be sent looking for a new stick--or at least a sharper one--to shake at illegal file swappers.
By the year 2038 when that was finally accomplished, the worldwide web would be employed to start matching the swappers up.
Alex Tennant, spokeswoman for Belfast Food Swop, said: "We will put out tables in the garden and swappers bring their extra food.
But the internet has transformed the way people set up swaps, making it easy to search for somewhere to stay and get in touch with potential swappers.
In the feeding clinic, Dr Christian Jessen pushed the diet swappers to look beyond what was on their plates to explore the psychological triggers that led to their dangerous diets.
For Margaret, the NCT register is ideal, because all swappers have children and their homes are set up for families.
Swappers were instructed to bring along three unwanted items of "good condition" clothing which they exchanged for a token.
Isn't it lucky we are being burgled the very night we are hosting Wife Swappers Anonymous.
Canadian Justice Konrad von Finckenstein rules that music swappers do not violate Canadian copyright laws.