What is the Difference Between Octet and Byte?

The main difference between an octet and a byte lies in their definitions and usage. Both terms are used to represent units of information in computing and telecommunications, but they have some distinctions:

• Octet: An octet is a set of 8 bits, and the term is derived from the prefix "octo" (meaning eight) found in Greek and Latin. Octet is often used in technical publications and standards to unambiguously specify that there are 8 bits.
• Byte: A byte is a set of adjacent bits operated on as a group. The term "byte" has historically been used to represent the smallest separately addressable unit of memory in a computer system, which was not always 8 bits. In modern computer systems, a byte is typically 8 bits, and the terms "byte" and "octet" are often used interchangeably.

In everyday use, the term "byte" is more common, especially in North America. However, due to the historical ambiguity of the byte size, the term "octet" is preferred in technical publications and international standards to ensure clarity. In some countries, such as France, French Canada, and Romania, the term "octet" is more commonly used in place of "byte".

Comparative Table: Octet vs Byte

The main difference between an octet and a byte lies in their definitions and the systems they are used in. Here is a comparison table highlighting the differences:

In modern computer systems, an octet is considered a byte, and the terms can be used interchangeably without much danger. However, it is essential to be aware of the differences when working with older systems or when absolute precision is required in technical documentation.