**Bit**

The smallest unit of information in a computer is dubbed Bit (Binary Digit). A little has actually a solitary binary worth, either 0 or 1. In many computer units, there are eight bits in a byte. The worth of a little is normally stored as either over or listed below a designated level of electrical charge in a solitary capacitor within a memory gadget.

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**Nibble**

Half a byte (4 bits) is referred to as a **nibble**.

**Byte**

In many computer system devices, a **byte** is a unit of information that is eight binary digits lengthy. A byte is the unit most computer systems use to recurrent a character such as a letter, number or typographic symbol (for instance, “g”, “5”, or “?”). A byte deserve to additionally host a string of bits that need to be offered in some larger unit of application objectives (for example, the stream of bits that constitute a visual picture for a routine that screens imperiods or the string of bits that constitutes the machine code of a computer system program).

In some computer systems, 4 bytes constitute a word, a unit that a computer system processor have the right to be designed to manage properly as it reads and procedures each instruction. Some computer processors can take care of two-byte or single-byte instructions.

A byte is abbreviated through a “B”. (A bit is abbreviated with a little “b”). Computer storage is commonly measured in byte multiples. For example, an 820 MB tough drive holds a nominal 820 million bytes – or megabytes – of data. Byte multiples are based upon powers of 2 and also frequently expressed as a “rounded off” decimal number. For instance, one megabyte (“one million bytes”) is actually 1,048,576 (decimal) bytes.

**Octet**

In some systems, the term octet is supplied for an eight-little unit rather of byte. In many devices, 4 eight-little bytes or octets create a 32-bit word. In such devices, instructions lengths are occasionally expressed as full-word (32 bits in length) or half-word (16 bits in length).

**Kilobyte**

A **Kilobyte** (kb or Kbyte) is around a thousand also bytes (actually, 2 to the 10th power, or decimal 1,024 bytes).

**Megabyte**

As a measure of computer system processor storage and real and virtual memory, a **megabyte** (abbreviated MB) is 2 to the 20th power byte, or 1,048,576 bytes in decimal notation.

**Gigabyte**

A **Gigabyte** (pronounced Gig-a-bite via difficult G’s) is a measure of computer data storage capacity and also is “roughly” a billion bytes. A gigabyte is 2 to the 30th power, or 1,073,741,824 in decimal notation.

**Terabyte**

A **Terabyte** is a measure of computer system storage capacity and also is 2 to the 40th power of 1024 gigabytes.

**Petabyte**

A **Petabyte **(PB) is a meacertain of memory or storage capacity and is 2 to the 50th power bytes or, in decimal, approximately a thousand terabytes (1024 terabytes).

**Exabyte**

An **Exabyte** (EB) is a big unit of computer system information storage, 2 to the sixtieth power bytes. The presettle exa way one billion billion, or on quintillion, which is a decimal term. Two to the sixtieth power is actually 1,152,921,504,606,846,976 bytes in decimal, or rather over a quintillion (or ten to the eighteenth power) bytes. It is prevalent to say that an Exabyte is about one quintillion bytes. In decimal terms, an Exabyte is a billion gigabytes.

**Zettabyte**

A **Zettabyte** (ZB) is equal to one sextillion bytes. It is generally abbreviated ZB. At this time, no computer has one Zettabyte of storage. It has 1024 Exabytes.

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**Yottabyte**

A **Yottabyte** is equal to one septillion bytes. It is typically abbreviated YB. At this time, no computer has one Zettabyte of storage. It has actually 1024 Zettabytes.