by Dinesh Thakur Category: Computer Terms

In American homes, or so the story goes, when visitors arrive they are given a cookie which in Britain would be a biscuit. This philosophy has now been extended to the Internet. Whenever a visitor, better known as a Browser, arrives at certain sites a cookie is sent down the line and saves itself to the local computer's hard disk.



 
by Dinesh Thakur Category: Computer Terms

As all search engines are different they all operate in slightly different ways. The good news is that the same search techniques can be applied to them all, but, as might be expected, each one is a variation around the same theme. To make it even worse not all search engines actually search the Internet, some are what is known as web directories. Then, just to confuse the picture even more some engines do keyword searches while others are concept based.

 
by Dinesh Thakur Category: Computer Terms

Of all these error codes by far the most common is 404 which is also one of the few that can be worked around - always assuming the website has not simply ceased to exist. Everything else can be fixed although it would help to explain the difference between web names as they appear in the press and as they appear in a Browser.

 
by Dinesh Thakur Category: Computer Terms

Derived from Users Network this is, again, totally separate from the WWW. Briefly, the Internet is also home to what are called news groups which are broadly divided into several categories and which cater for every topic imaginable.

 
by Dinesh Thakur Category: Computer Terms

"AirDrop" is a very handy feature and easy to use for wireless file transfer between Mac, even outside the context of a home network. AirDrop arrived on the iPad and iPhone with iOS 7 and on Mac with Mac OS X Lion. Indeed not need a router or even connect to an existing Wi-Fi or Bluetooth network to use "AirDrop". There is nothing to set up, all you need is a recent Mac ("AirDrop" indeed requires a recent Mac to be activated) and communication will be made directly between Wi-Fi cards Mac (ad-hoc mode).

 
by Dinesh Thakur Category: Computer Terms

To understand what defragmentation IS, a person must first understand how data files are saved onto magnetic storage disks. Whether on a floppy disk or a hard disk, data is stored in a certain format. Formatting consists of dividing a disk into organized sections so that data can be located by the computer. Formatting organizes disks into concentric rings called tracks. Tracks are divided into sectors (pie shaped wedges) in which files and parts of files are stored.



 
by Dinesh Thakur Category: Computer Terms

(Multiple-instruction multiple-data) A generic description that can be applied to any MULTIPROCESSOR computer architecture in which each processor is able to execute a different program, as distinct from a SIMD architecture in which each processor executes the same program on a different data item. With MIMD architecture, the deployment of the program code onto the different processors and the interconnection TOPOLOGY of the processors become visible to the programmer, and complicate the writing of programs.



 
by Dinesh Thakur Category: Computer Terms

Before a disk can be useful in a computer, the disk must be formatted. Formatting, also called initializing, organizes the storage area on the disk-it magnetically marks the disk with tracks and sectors, each with indicated boundaries, so that the information you store can later be located easily. The process involves erasing all that is on the disk, testing the disk to make sure all of its sectors are reliable, and creating a directory-an internal address system used for locating information later.



 
by Dinesh Thakur Category: Computer Terms

Processor decides the speed of the computer that it will execute the instruction fast or it will process slow. When a user thinks about to purchase a system the first question is in mind is processor. The first commercial microprocessor was the Intel 4004 launched in 1971, which was designed to be used in a Japanese desk calculator.



 
by Dinesh Thakur Category: Computer Terms

(Dual In-line Memory Module) A small PRINTED CIRCUIT BOARD with RAM chips mounted on both sides and a single edge connector, via which it can be plugged into a computer MOTHER BOARAD. DIMM differs from a SIMM in that the chips on either side have separate pins on the edge connector, permitting a wider 128-bit data path for faster access to the memory; hence they tend to be used in more expensive systems like servers.



 
by Dinesh Thakur Category: Computer Terms

A trackball is an alternative to a mouse or a stylus. It looks kind of like a mouse upside-down, and you use it by rolling the ball around with your fingers. It has one or more buttons to click, just like a mouse.

 
by Dinesh Thakur Category: Computer Terms

SIMM stands for single inline memory module. Before you try to understand what a SIMM is, you should read and understand RAM and memory.

 
by Dinesh Thakur Category: Computer Terms

A serial port is the socket (also known as an "input/output connector") where you plug in the cables to attach to a serial device, such as a printer or modem.



 
by Dinesh Thakur Category: Computer Terms

A disk has two sides (a top and a bottom). Each side of the disk has tracks (concentric rings) on the surface. Each ring is divided into arc-shaped sectors, little units of storage space on the disk, usually 512 bytes on a floppy disk and up to several thousand bytes on a hard disk. Whatever the size, a sector is the smallest unit the computer can read or write at a time; it cannot deal with portions of a sector.



 
by Dinesh Thakur Category: Computer Terms

SCSI (pronounced "scuzzy," not "sexy") stands for small computer systems interface. SCSI is a standard for interfacing, or connecting, personal computers to peripheral devices (like scanners, hard disks, or CD-ROM players) and having them send information to each other.



 
by Dinesh Thakur Category: Computer Terms

A scanner is a device that takes a picture of an image that exists outside the computer, such as a photograph or a drawing on paper. As the scanner takes the picture, it digitizes the image (breaks it up into dots that can be recreated on the computer screen with electronic signals), and send this digital information to the computer as a file. Then you can take this file of the scanned image and use it in your work.



 
by Dinesh Thakur Category: Computer Terms

These spoonfuls of alphabet-number soup designate different standards for connecting serial devices (like modems, mice, and printers) to the computer by plugging their cables into serial ports. Through a serial port, the computer exchanges information with the device back and forth "serially," or one bit at a time.



 
by Dinesh Thakur Category: Computer Terms

A plotter is a graphics printer that literally uses ink pens to draw the images. The pens move around on the surface of the paper like something out of The Sorcerer's Apprentice. Plotters can only draw data in vector graphics format, graphics that are made of straight lines (the curved forms are actually drawn with many tiny straight lines). There are flatbed plotters where the pen moves across the page in the x and y axes.



 
by Dinesh Thakur Category: Computer Terms

PCL, short for printer command language, consists of a large set of commands for controlling the Hewlett-Packard LaserJet and DeskJet families of printers, and compatible printers from other manufacturers. PCL commands are used to tell the printer where to place text or graphics on the page, which font to print, whether to print bold, italic or underlined text, and so on.



 
by Dinesh Thakur Category: Computer Terms

You have probably heard of printer ports and modem ports and perhaps ADB ports or some other kind of port. A port is a plug, or receptacle (known in other computer dictionaries as an input/output connector). Once you insert one end of a cable into a port, information can flow between your computer and whatever device is attached to the other end of the cable.



 

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About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.



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