COMPUTERS
* Part of a computer's memory is microchips built in at the factory and known as ROM, or read-only memory. ROM carries the basic working instructions.
* RAM (Random-Access Memory) consists of microchips that receive new data and instructions when needede.
* Data can also be stored as magnetic patterns on a removable disk, or on the laser-guided bumps on a CD (compact disk) or DVD (digital versatile disk).
* At the heart of every computer is a powerful microchip called the central processing unit, or CPU.
* The CPU works things out, within the guidelines set by the computer's ROM. It carries out programs by sending data to the right place in the RAM.
* Computers store information in bits (binary digits), either as 0 or 1.
*The bit 0 and 1 are equivalent to the OFF and ON of electric current flow. Eight bits make a byte.
*A kilobyte is 1024 bytes, a megabyte (MB) is 1,048,576 bytes; a gigabyte (GB) is 1,073,741,824 bytes; a terabyte (TB) is 1,000,000,000,000 bytes.
* A CD can hold about 600 MB of data - about 375,000 pages of ordinary text.
* RAM (Random-Access Memory) consists of microchips that receive new data and instructions when needede.
* Data can also be stored as magnetic patterns on a removable disk, or on the laser-guided bumps on a CD (compact disk) or DVD (digital versatile disk).
* At the heart of every computer is a powerful microchip called the central processing unit, or CPU.
* The CPU works things out, within the guidelines set by the computer's ROM. It carries out programs by sending data to the right place in the RAM.
* Computers store information in bits (binary digits), either as 0 or 1.
*The bit 0 and 1 are equivalent to the OFF and ON of electric current flow. Eight bits make a byte.
*A kilobyte is 1024 bytes, a megabyte (MB) is 1,048,576 bytes; a gigabyte (GB) is 1,073,741,824 bytes; a terabyte (TB) is 1,000,000,000,000 bytes.
* A CD can hold about 600 MB of data - about 375,000 pages of ordinary text.
