{"id":51558,"date":"2026-02-25T23:12:52","date_gmt":"2026-02-25T23:12:52","guid":{"rendered":"https:\/\/www.oracletutoring.ca\/blog\/?p=51558"},"modified":"2026-02-25T23:12:54","modified_gmt":"2026-02-25T23:12:54","slug":"computer-science-mb-vs-mib","status":"publish","type":"post","link":"https:\/\/www.oracletutoring.ca\/blog\/computer-science-mb-vs-mib\/","title":{"rendered":"Computer science: MB vs MiB"},"content":{"rendered":"\n<h2>Self-tutoring about computer science terms: the tutor mentions one he&#8217;s noticed.<\/h2>\n<p>\nThe following is according to my understanding.<\/p>\n<p>\nWhen I was a kid, computer ideas were measured in Kilobytes, or KB. A computer might have, back then, 5KB of RAM: we called that 5K. By itself, K meant &#8220;kilo&#8221;, and stood for &#8220;thousand.&#8221; However, it really stood for 2^10, or 1024. Since 1024 was very close to 1000, being off by just 2.4 percent, people were happy enough to accept the misnomer because of its convenience.<\/p>\n<p>\nFollowing that custom, MB, or megabyte, was really 1024&#215;1024=1048576 bytes, which was off by about five percent. Once again, &#8220;everyone&#8221; knew what it meant. In the context of computers, people accepted slightly different definitions of kilo and mega.<\/p>\n<p>\nYet, today I was changing a disk partition, and the application mentioned MiB. I had to look up what that means: &#8220;Mebibyte.&#8221; A Mebibyte, it turns out, is truly 2^20 = 1048576 bytes. There is a whole system for literal memory measures: KiB means &#8220;Kibibyte,&#8221; which is 2^10 = 1024 bytes, for instance. GiB means Gibibytes, truly 2^30 bytes.<\/p>\n<p>\nIt seems Kibi, Mebi, Gibi, etc. have been around since 1998. I&#8217;ve only started noticing them recently, however.<\/p>\n<p>\nInteresting, eh?<\/p>\n<p>Source:<\/p>\n<p><a href=\"https:\/\/www.techtarget.com\/searchstorage\/definition\/mebibyte-MiB\">techtarget.com<\/a><\/p>\nJack of <a href=\"https:\/\/www.oracletutoring.ca\">Oracle Tutoring by Jack and Diane,<\/a> Campbell River, BC.\n","protected":false},"excerpt":{"rendered":"<p>Self-tutoring about computer science terms: the tutor mentions one he&#8217;s noticed. The following is according to &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"more-link\" href=\"https:\/\/www.oracletutoring.ca\/blog\/computer-science-mb-vs-mib\/\"> <span class=\"screen-reader-text\">Computer science: MB vs MiB<\/span> Read more \u2192<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[105],"tags":[4085,4089,4090,4087,4091,4088,4086],"class_list":["post-51558","post","type-post","status-publish","format-standard","hentry","category-computer-science","tag-computer-terminology","tag-gib","tag-gibibyte","tag-kib","tag-kibibyte","tag-mebibyte","tag-mib"],"_links":{"self":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts\/51558","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/comments?post=51558"}],"version-history":[{"count":5,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts\/51558\/revisions"}],"predecessor-version":[{"id":51563,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts\/51558\/revisions\/51563"}],"wp:attachment":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/media?parent=51558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/categories?post=51558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/tags?post=51558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}