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On IBM PC compatible personal computers from the 1980s, the BIOS allowed the user to hold down the Alt key and type a decimal number on the keypad. It would place the corresponding code into the keyboard buffer so that it would look (almost) as if the code had been entered by a single keystroke.
To use alt key codes for keyboard shortcut symbols you’ll need to have this enabled. ... Press and hold the alt key, and then press numbers. You don’t need to press the + key. And that’s it!
This page lists codes for keyboard characters, the computer code values for common characters, such as the Unicode or HTML entity codes (see below: Table of HTML values"). There are also key chord combinations, such as keying an en dash ('–') by holding ALT+0150 on the numeric keypad of MS Windows computers.
The Alt key on a Lenovo laptop keyboard ISO keyboard symbol for “Alternate” The Alt keyAlt (pronounced / ɔː l t / AWLT or / ʌ l t / ULT) on a computer keyboard is used to change (alternate) the function of other pressed keys. Thus, the Alt key is a modifier key, used in a similar fashion to the Shift key.
Also Alt+0 128 through Alt+0 159 yield the characters assigned in rows 8 and 9 in the CP1252 layout, rather than the C1 control codes that are assigned to those numbers in Unicode. In programs which were not designed to handle Alt codes over 255, the character retrieved usually corresponds to the remainder when the number is divided by 256.
Keyboard shortcuts make it easier and quicker to perform some simple tasks in your AOL Mail. Access all shortcuts by pressing shift+? on your keyboard. All shortcuts are formatted for Windows computers, but most will work on a Mac by substituting Cmd for Ctrl or Option for Alt. General keyboard shortcuts
Code Decimal Octal Description Abbreviation / Key C0: U+0000 0 000 Null character: NUL U+0001 1 001 Start of Heading: SOH / Ctrl-A U+0002 2 002 Start of Text: STX / Ctrl-B U+0003 3 003 End-of-text character: ETX / Ctrl-C 1: U+0004 4 004 End-of-transmission character: EOT / Ctrl-D 2: U+0005 5 005 Enquiry character: ENQ / Ctrl-E U+0006 6 006 ...
IBM states that AltGr is an abbreviation for alternate graphic. [3] [4]Sun Microsystems keyboard, which labels the key as Alt Graph. A key labelled with some variation of "Alt Graphic" was on many computer keyboards before the Windows international layouts.