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Glossary of terms and definitions for IT (Information Technology), the Internet and cyber security.
This glossary provides more than 480 clear and concise definitions of commonly used terms in the fields of information technology, the internet, and cyber security. It is designed to support users of all levels in understanding key concepts, technical jargon, and acronyms frequently encountered across digital platforms and security-related discussions. Whether you are a business owner, student, professional, or simply interested in the digital landscape, this resource aims to enhance your knowledge and confidence in navigating the ever-evolving world of technology.
A basic unit of digital information storage equal to eight bits, commonly used to represent a single character of text and measure file sizes and memory capacity.
Example: The data file used 700 bytes of storage space.
A unit of digital information equal to exactly 1,024MiB. (1024 mebibytes.) There is no confusion with how big a gibibyte (GiB) is as there could be with a gigabyte (GB). Therefore, GiB is the more correct term to use.
Example: The operating system used approximately 10GiB of disk space.
See also: Gigabyte (GB), Mebibyte (MiB)
A unit of digital information equal to 1,024MB (1024 megabytes) in most computing contexts, however disk drive manufacturers use it to mean 1,000,000 bytes in order to report larger storage capacities.
Example: The operating system used approximately 10GB of disk space.
See also: Gibibyte (GiB), Megabyte (MB)
A unit of digital information equal to exactly 1,024 bytes. There is no confusion with how big a kibibyte (KiB) is as there could be with a kilobyte (KB). Therefore, KiB is the more correct term to use.
Example: The document was 50KiB in size.
See also: Kilobyte (KB), Byte
A unit of digital information equal to 1,024 bytes in most computing contexts, however disk drive manufacturers use it to mean 1,000 bytes in order to report larger storage capacities.
Example: The document was 50KB in size.
See also: Kibibyte (KiB), Byte
A unit of digital information equal to exactly 1,024KiB. (1024 kibibytes.) There is no confusion with how big a mebibyte (MiB) is as there could be with a megabyte (MB). Therefore, MiB is the more correct term to use.
Example: The music file used 4MiB of space.
See also: Megabyte (MB), Kibibyte (KiB)
A unit of digital information equal to 1,024KB (1024 kilobytes) in most computing contexts, however disk drive manufacturers use it to mean 1,000 bytes in order to report larger storage capacities.
Example: The music file used 4MB of space.
See also: Mebibyte (MiB), Kilobyte (KB)
A unit of digital information equal to exactly 1,024TiB. (1024 tebibytes.) There is no confusion with how big a pebibyte (PiB) is as there could be with a petabyte (PB). Therefore, PiB is the more correct term to use.
Example: 1PiB is really really large.
See also: Petabyte (PB), Tebibyte (TiB)
A unit of digital information equal to 1,024TB (1024 terabytes) in most computing contexts, however disk drive manufacturers use it to mean 1,000,000,000,000 bytes in order to report larger storage capacities.
Example: 1PB is really really large.
See also: Pebibyte (PiB), Terabyte (TB)
A unit of digital information equal to exactly 1,024GiB. (1024 gibibytes.) There is no confusion with how big a tebibyte (TiB) is as there could be with a terabyte (TB). Therefore, TiB is the more correct term to use.
Example: Because of the way drive manufacturers represent terabytes, a 1TB drive only contains 931GiB of storage space.
See also: Terabyte (TB), Gibibyte (GiB)
A unit of digital information equal to 1,024GB (1024 gigabytes) in most computing contexts, however disk drive manufacturers use it to mean 1,000,000,000 bytes in order to report larger storage capacities.
Example: Because of the way drive manufacturers represent terabytes, a 1TB drive only contains 931GB of storage space.
See also: Tebibyte (TiB), Gigabyte (GB)