Day 92/100: The Pipe/Vertical Bar. The vertical bar ( | ) is a computer character and glyph with various uses in mathematics, computing, and typography. It has many names, often related to particular meanings: Sheffer stroke (in logic), verti-bar, vbar, stick, broken bar, vertical line, vertical slash, bar, glidus, obelisk, or pipe. A pipe is an inter-process communication mechanism originating in Unix, which allows the output (standard out and, optionally, standard error) of one process to be used as input (standard in) to another. In this way, a series of commands can be "piped" together, giving users the ability to quickly perform complex multi-stage processing from the command line or as part of a Unix shell script ("bash file"). In most Unix shells (command interpreters), this is represented by the vertical bar character. The vertical bar is also used as a mathematical symbol in numerous ways & in notation in quantum physics. (Fancy!) [Wooden ruler on white paper] #100daysofthepunctuationproject #the100dayproject #gm100dayproject #100days #punctuation #thepunctuationproject #punctuationsymbols #punctuationdesign #punctuationlibrary #creativerepresentation #creativehabit #dailyhabit #ruler #pipe #verticalpipe #shefferstroke #logic #mathematicalsymbols #mathematicalpunctuation #quantumphysics #programming #programmingsymbols #green #unix #obelisk #glyph #typography #typographicalsymbols