: Unicode character recognition.

Unicode character information

Left parenthesis

Displayed on your computer as: (
(if the character is not rendered properly, you may not have the appropriate fonts)

Unicode name: Left parenthesis
Alternative names: Codepoint (hexadecimal): 0x0028
Codepoint (decimal): 40
In unicode block: Basic Latin

Html entities:

( or (

Character input:

There is no universal input system for Unicode characters. But you can use the system specific input methods below.

WindowsHold down Alt and press + on the numeric keyboard. Type: 0028 and release Alt. A registry key needs to be enabled for this to work. See Unicode input (wikipedia) for more details.
Linux: Hold down Crtl and ⇧ Shift and type U0028. Now press ↵ Enter and release Crtl and ⇧ Shift.

Other Infos:

General category: Ps (Open_Punctuation): An opening punctuation mark (of a pair).
Bidirectional class is: ON (Other_Neutral): Most other symbols and punctuation marks.
Canocial combining class is: 0 (Not_Reordered): Spacing and enclosing marks; also many vowel and consonant signs, even if nonspacing.