Editing Metric prefix (section)

==== Keyboard entry ====
Most English-language keyboards do not have a "{{math|μ}}" key, so it is necessary to use a key-code; this varies depending on the operating system, physical keyboard layout, and user's language.

; For all keyboard layouts
:* On [[Microsoft Windows]] systems,
:** arbitrary Unicode codepoints can be entered in decimal with: {{key press|Alt}} sustained, {{key press|0}} {{key press|1}} {{key press|8}} {{key press|1}}, and releasing {{key press|Alt}}. A leading "0" is required<br/> (this registers as the corresponding Unicode hexadecimal code-point, 0xB5 = 181.), or
:** arbitrary Unicode codepoints can be entered in hexadecimal as: {{key press|Alt|+}}{{key press|b}}{{key press|5}}<br/> (up to 5&nbsp;hexadecimal characters, not counting the leading '+', upper or lower case), or
:** in the tradition of MS-DOS, [[CP437|IBM code page 437]] one can also enter old code-points in decimal: {{key press|Alt|2}}{{key press|3}}{{key press|0}}<br/> (the leading zero must be omitted);
:* On [[Linux]] systems,
:** under X11, when a [[Compose key]] has been enabled: {{key press|Compose}}{{key press|m}}{{key press|u}}
:** under X11, with ''ibus'' version 1.5.19 (or higher) active, and a non-composing input method selected<!-- e.g. mozc-Japanese-Hiragana mode overrides keystrokes like 'u','b',SPACE to provide the hiragana/kanji composition feature -->: The default keybinding for starting codepoint input is {{key press|Ctrl|Shift|u}}. The key sequence {{key press|Ctrl|Shift|u}} {{key press|b}} {{key press|5}} {{key press|space}} then produces U+00B5, the micro sign.
:** on the VGA console's virtual terminals like tty1: arbitrary Unicode codepoints can be entered in decimal as: {{key press|Alt}} sustained, {{key press|1}} {{key press|8}} {{key press|1}}, and releasing {{key press|Alt}}. A leading "0" is not required.

; For QWERTY keyboard layouts
:* On [[Linux]] systems,
:** code-point U+00b5 can be entered as {{key press|right-alt|m}} (provided the right [[alt key]] is configured to act as {{code|AltGr}}).
:* On [[MacOS]] systems, code-point U+00b5 can be entered as either {{key press|Opt|m}} or {{key press|Opt|Y}}.