Tuesday, September 25, 2007

Grape

A grape is the non-climacteric fruit that grows on the perennial and deciduous woody vines of the folks Vitaceae. Grapes grow up in clusters of 6 to 300, and can be black, blue, golden, green, purple, red, pink, brown, peach or white. They can be eaten raw or used for producting jam, grape juice, jelly, wine and grape seed oil. Cultivation of grapevines occurs in vineyards, and is called viticulture. One who studies and practises growing grapes for wine is called a viticulturist.The leaves of the grape vine itself are considered safe to eat and are used in the production of dolmades.

Thursday, September 13, 2007

Print spooler

In computer science, spooling is an acronym for simultaneous peripheral operations on-line. It refers to putting jobs in a buffer, a special area in memory, or on a disk where a device can access them when it is ready.

Spooling is useful because campaign access data at different rates. The buffer provides a waiting station where data can reside while the slower device catches up. Objects is only added and deleted at the ends of the area; there is no random access or editing. This also allows the CPU to work on other tasks while waiting for the slower device to do its task.

It can also refer to a storage device that incorporates a physical pin, such as a tape drive.

The most common spooling application is print spooling. In print spooling, documents are loaded into a buffer, and then the printer pulls them off the buffer at its own rate. Because the documents are in a buffer where they can be accessed by the printer, the user is free to perform other operations on the computer while the printing takes place in the surroundings. Spooling also lets users place a number of print jobs on a queue instead of waiting for each one to finish before specifying the next one.

Thursday, September 06, 2007

Mainframes

Mainframes (often colloquially referred to as big iron) are huge and expensive computers used mainly by government institutions and large companies for mission critical applications, usually bulk data processing such as censuses, industry/consumer statistics, ERP, and financial transaction processing.
The term originated during the early 1970s with the introduction of smaller, fewer complex computers such as the DEC PDP-8 and PDP-11 series, which became known as minicomputers or just minis. The industry/users then coined the term "mainframe" to describe bigger, earlier types (previously known simply as "computers").