New Page 1
Welcome to basicsofcomputer.com

Home » Storage Devices of Computer » Bits, Bytes and Words

# Bits, Bytes, and Words/Storage Units:

Each 0 or 1 in the binary system is called a bit abbreviation of binary digit. The bit is the basic unit for storing data in computer memory 0 means off, 1 means on. Notice that since a bit is always either on or off, a bit in computer memory is always storing some kind of data.

Since single bits by themselves cannot store all the number, letters, and special character (such as \$ and %) that a computer must process, the bits are put together in a group called a byte (pronounced "bite"). There are usually 8 bits in a byte. Each byte usually represents one character of letter, digit, or special character.

## Bit:

Abbreviation of binary digits (0 or 1), the smallest unit of data storage. One bit occupies one store location.

## Byte:

A group of combination of 8 bits is called a byte. One byte can store one one character.

## Word:

A complete word is a combination of one or more bytes handled together as a single unit for processing  and may thus be of 8, 16, 32, or 64 bits. The length of word varies from machine to machine but it predetermined for each machine. A computer reads and processes all the bites of the word at a time.

## Storage Units:

 Bit = 0,1 8 bits = Byte 1024 Bytes = 1 Kilobyte 1024 KB = 1 Megabyte 1024 MB = 1 Gigabyte 1024 GB = 1 Terabyte

## Capacity of  Memory:

Computer manufacturers express the capacity of memory and storage in terms of the number of bytes it can hold. The number of bytes can be expressed as kilobytes. Kilo represents 2 to the tenth power, or 1024. Kilobyte is abbreviated KB or simply K. (Sometimes K is used casually to mean 1000, as in "I earned 300\$ last year"). A kilobyte is 1024 bytes. Thus, the memory of a 640K computer can store 640×1024 bytes. Memory capacity may also be expressed in tern of megabytes (1024×1024 bytes). One megabyte abbreviated MB, means roughly, one million bytes. With storage devices, manufacturers sometimes express memory amounts in terms of gigabytes (abbreviated GB) billions of bytes.

## Relevant Articles:

 Storage Ranking Storages Locations and Addresses Why More Bits Fixed and Variable Word Length Storage Bits, Bytes, and Words Internal Memory Devices External Memory Devices Organizing and Accessing Stored Data Types of Files Processing Stored Data

New Page 1

Basic Computer Science

 » The Age of Information » Types of Computer and Digital Age » Input and Output Devices » Storage Devices Of Computer » Central Processing Unit » Software: The Power Behind The Power » Data Communication and Computer Networks » The Nature Of Information » The System Theory » Transaction Processing System (TPS) and Management Information System (MIS) » » Expert System (ES) and Office Information System (OIS)

Operating Systems

 » Introduction to Operating System » Introduction to Process Management » Threads and CPU Scheduling » Process Synchronization in Operating System » Deadlocks » Memory Management in Operating System » Virtual Memory in Operating System » File System Management in Operating System » I/O and Device Management » Security » Linux Operating System

Database Management System

 » Introduction to Database Systems » Database System Architecture » Database Administration and Database Development Process » The Entity-Relationship Model » Semantic Object Model » Logical Database Design and Relational Data Model » Normalization in Database » Transformation of E-R Model into Relational Data Model » Representing Semantic Object Model and Types of Semantic Object Model » Physical Database Design » Introduction to Structured Query Language (SQL) » Implementation of Relational Database and Database Application Design » Client Server Database Systems & Open Database Connectivity (ODBC)