ASCII art basically consists of pictures pieced together from characters (preferrably from the set defined by ASCII). They can be created with any text editor. Most require a [non-proportional font]? for correct viewing.
The simplest forms of ASCII Art are the smiley and its kin: little two- or three-character combinations for expressing emotion in text. :-) More complex examples used several lines of text to draw large symbols or crude representations or more complex figures. It was popular to put such art in one's [signature file]? to be included in all your e-mail and Usenet postings. Some common examples:
(__) (oo) /-------\/ O / | || /o)\ /H\ * ||----|| \(o/ / \ ~~ ~~ Cow Yin/Yang? Person
Some types ignore the particular shape of the characters and treat them as more-or-less filled boxes:
_a, _yQa. _qTWW( je`?QX: <d+ -3Wm; _qos_s%mWw, a2?????TWW( sd( -?Qm;. .amm; .xmWmc """""` """""""
ASCII Art is and was used wherever text can be more readily printed or transmitted than graphics. This includes typewriters, teletypes, computer terminals, early computer networking, e-mail and Usenet news messages.
Animated ASCII art is possible by embedding ANSI escape sequences for cursor movement into the "picture".