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propositional logic, Boolean algebra, first-order logic. ⊥ {\displaystyle \bot } denotes a proposition that is always false. The symbol ⊥ may also refer to perpendicular lines. The proposition. ⊥ ∧ P {\displaystyle \bot \wedge P} is always false since at least one of the two is unconditionally false. ∀.
Larry Tesler created the concept of cut, copy, paste, and undo for human-computer interaction while working at Xerox PARC to control text editing.During the development of the Macintosh it was decided that the cut, paste, copy and undo would be used frequently and assigned them to the ⌘-Z (Undo), ⌘-X (Cut), ⌘-C (Copy), and ⌘-V (Paste).
These are the standard shortcuts: Control-Z (or ⌘ Command + Z) to undo. Control-X (or ⌘ Command + X) to cut. Control-C (or ⌘ Command + C) to copy. Control-V (or ⌘ Command + V) to paste. The IBM Common User Access (CUA) standard also uses combinations of the Insert, Del, Shift and Control keys. Early versions of Windows used the IBM ...
Copy-and-paste programming. Copy-and-paste programming, sometimes referred to as just pasting, is the production of highly repetitive computer programming code, as produced by copy and paste operations. It is primarily a pejorative term; those who use the term are often implying a lack of programming competence and ability to create abstractions.
Wikipedia and its fellow sites are hosted by the Wikimedia Foundation, a non-profit organisation based in the United States. Sites like Google or Yahoo are hosted on thousands of servers, with thousands of employees; we have around 800 servers and around 350 staff, and cover our costs through donations—almost all from members of the public.
This article is a list of standard proofreader's marks used to indicate and correct problems in a text. Marks come in two varieties, abbreviations and abstract symbols. These are usually handwritten on the paper containing the text. Symbols are interleaved in the text, while abbreviations may be placed in a margin with an arrow pointing to the ...
On a computer running the Microsoft Windows operating system, many special characters that have decimal equivalent codepoint numbers below 256 can be typed in by using the keyboard's Alt + decimal equivalent code numbers keys. For example, the character é (Small e with acute accent, HTML entity code é) can be obtained by pressing Alt + 130.
Using Lorem ipsum to focus attention on graphic elements in a webpage design proposal One of the earliest examples of the Lorem ipsum placeholder text on 1960s advertising. In publishing and graphic design, Lorem ipsum (/ ˌ l ɔː. r ə m ˈ ɪ p. s ə m /) is a placeholder text commonly used to demonstrate the visual form of a document or a typeface without relying on meaningful content.