kb
Word family
Synonym discussion
Sense: noun/1
kb, kilobyte, MB, and GB are all short forms that talk about how much information a file or device holds. kb is the short written label for kilobyte, the smallest of the four; it shows up next to small items like icons, short emails, or low-resolution images, usually after a number such as '48 kb'. Kilobyte is the full written word, useful in classroom or technical writing where the short label might be unclear. MB stands for megabyte and is roughly one thousand kb; photos, songs, and short videos are usually measured in MB. GB stands for gigabyte and is about one thousand MB; phone storage, films, and large apps are counted in GB. So a tiny logo might be 12 kb, a song around 4 MB, and a phone 128 GB.
Common collocations
Etymology
kb is a modern English short form rather than an old word with its own history. It shortens kilobyte, which was built in the mid-1900s from the Greek-based prefix kilo- ('thousand') joined with byte, a computing word coined by IBM engineers in 1956 for a small unit of digital information. The lowercase pair of letters became a handy on-screen label as personal computers and small files spread in the 1980s and 1990s.