by Dinesh Thakur Category: Computer Terms

COMMAND.COM is the program that serves as the DOS command processor, or the DOS shell if you prefer. Like any operating system, DOS itself is simply software, albeit software that has a very special role in running your computer. Dos consists of a conglomeration of programs, utilities, and device drivers, but at its core are three key pieces of software. They must be present on the disk you use to start your computer, or the computer won't work. Of these three pieces of software, the only one you're likely to run across is COMMAND.COM-you'll see it in the list of files on your screen when you display the directory of that start-up disk, by typing DIR and pressing Enter. (The other two essential DOS files are hidden files, so you won't see them in the directory list.)



 
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 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

ANSI.SYS (pronounced "ansee dot sis") is a driver file a little software module, or controller used by MSDOS and OS/2, ANSI.SYS tells the computer how to display information based on the standard codes adopted by the American National Standards Institute (ANSI). Each code in the ANSI table represents either a character (like the letter S) or a number (such as the number 5), and other keys found on the keyboard (such as the Enter key). Some codes in the table are not found on the keyboard, but programs use them for specific purposes (such as making the PC beep, or moving the cursor to the next line on-screen).



 
by Dinesh Thakur Category: Computer Terms

Clock speed refers to how fast the system clock drives the computer's CPU (central processing unit, the chip that runs the computer) which determines how fast the system as a whole can process information internally. Clock speed is measured in megahertz; a speed of one megahertz (l MHZ) means the system clock is sending out its electric current one million times per second. The higher the clock speed of a computer, the faster the computer can operate, assuming all other factors are equal. However, clock speed isn't the only factor that determines your computer's overall performance, or even how fast the microprocessor (another term for the cpu) gets things done. Two different microprocessors may run at the same clock speed, and still take different amounts of time to finish a given job.



 
by Dinesh Thakur Category: Computer Terms

Automated Teller Machine (ATM) Also called a CASH POINT, a combined computer terminal and cash dispensing machine connected via a WAN to a bank's central computers, that enables customers to make cash withdrawals and inspect account details from public sites such as streets, airports, shops and petrol stations. ATMs typically provide a small display screen that presents menus to the user, surrounded by a small number of buttons to make menu selections, and a numeric keypad for entering the customer's PIN number - the latter is checked against that stored on the customer's cash card, which must be inserted into a slot as a means of AUTHENTICATION.



 
by Dinesh Thakur Category: Computer Terms

CD-R (Compact Disc Recordable) AWRITE-ONCE version of the CD-ROM disc, which can be used to distribute and back up computer data or to copy music CDS. Though it follows the same data format and can be read in standard CDROM drives, CD-R employs quite a different physical storage process, based on an organic dye film that is selectively bleached by a laser beam, which explains the blue or green colour of the recording surface.



 
by Dinesh Thakur Category: Computer Terms

Bandwidth measures the amount of information that can flow between two points in a certain period of time. The "broader" the bandwidth, the faster the information flow. You can use the term to describe how quickly information moves from the hard disk into memory, or from the computer to an add-in board on the expansion bus, or from one modem to another across a telephone line. Depending on whether the transmission is digital or analog, the rate is measured in bits per second (bps) or in hertz (cycles per second).



 
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

The B word. If something is wrong with a piece of software or hardware so that it stops working or destroys your data or just acts weird, the product is said to have a bug, or to be buggy. The term actually comes down to us from the real live crawling and flying bugs that used to get into those old giant-sized computers .

 

Page 2 of 8

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.



Search Content







Popular Article