checkpoint

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checkpoint

[′chek‚pȯint]
(cell and molecular biology)
A point in the eukaryotic cell cycle at which the cycle may continue if specific conditions are present or will stop if conditions are not right.
(computer science)
That place in a routine at which the entire state of the computer (memory, registers, and so on) is written out on auxiliary storage (tape, disk, cards) from which it may be read back into the computer if the program is to be restarted later.
(navigation)
Geographical location on land or water above which the position of an aircraft in flight may be determined by observation or by electronic means.

checkpoint

i. A predetermined point on the earth's surface used as a means of controlling movement, a registration target for fire adjustment, or a reference for location.
ii. A geographical location on land or water above which the position of an aircraft in flight may be determined by observation or by electronic means.

checkpoint

(programming)
Saving the current state of a program and its data, including intermediate results, to disk or other non-volatile storage, so that if interrupted the program could be restarted at the point at which the last checkpoint occurred.

This facility came into popular use in mainframe operating systemss such as OS/360 in which programs frequently ran for longer than the mean time between system failures. If a program run fails because of some event beyond the program's control (e.g. hardware or operating system failure) then the processor time invested before the checkpoint will not have been wasted.
References in periodicals archive ?
We sent only four suicide bombers to attack this checkpost.
Al Ghuwaifat checkpost is well equipped with waiting halls, passports checking cabins and passageways for cars along with other amenities including an ambulance furnished with the latest medical devices," Major Al Afari added.
An eyewitness Haji Mansoor Khan said that the suicide bomber soon after reaching the checkpost also opened fire on the soldiers.
People traveling on the road leading to Pakistan-Afghan border passes are accompanied by paramilitary guards and pass through several checkposts before reaching the border, about 30 kilometers from Peshawar in the Northwest Frontier Province.
local time when an explosive-laden car rammed into a checkpost in the Datta Khel area, some 14 kilometers away from North Waziristan's capital town of Miransha.
ISLAMABAD, Dec 27 (KUNA) -- At least two paramilitary troopers were killed and several others have gone missing after suspected Taliban militants attacked the security forces checkpost in Pakistan's northern tribal area Thursday evening, said sources.
A suspected militant was doing exactly that on Tuesday near the Landaki checkpost when security forces shot him dead.
ISLAMABAD (PAN): Seven people including three security men were killed in a suicide attack at security forces checkpost in Doaba area of Hangu on Tuesday.
Other officials, speaking anonymously, said as many as 35 people died and 40 were wounded in the attacks that targeted a bus carrying personnel from a military intelligence organization and a military checkpost.
JAMRUD -- Pakistan Muslim LeagueNawaz Agency General Secretary Saeed Jan Kokikhel demanded the concerned authorities that animals smuggling to Afghanistan should be stopped as well as personnela[euro](tm)s should be changed of Bhagyari CheckPost and the Political Agency Khyber should be changed as well.
Summary: A suicide bomber targeted an Afghan police checkpost on the outskirts of Kabul, killing one .