:ASCII art: n. The fine art of drawing diagrams using the ASCII character set (mainly `|', `-', `/', `\', and `+'). Also known as `character graphics' or `ASCII graphics'; see also {boxology}. Here is a serious example:

o——)||(—+—|<——+ +————-o + D O
L )||( | | | C U
A I )||( +—>|-+ | +-\/\/-+—o - T
C N )||( | | | | P
E )||( +—>|-+—)—-+—)|—+-o U
)||( | | | GND T
o——)||(—+—|<——+—————+

A power supply consisting of a full wave rectifier circuit feeding a capacitor input filter circuit

Figure 1.

And here are some very silly examples:

|\/\/\/| ____/| ___ |\_/| ___
| | \ o.O| ACK! / \ |` '| / \
| | =()= THPHTH! / \/ \/ \
| (o)(o) U / \
C
) (__) \/\/\/\ _____ /\/\/\/
| ,___| (oo) \/ \/
| / \/———-\ U (__)
/____\ || | \ /—-V `v'- oo )
/ \ ||—-W|| * * |—| || |`. |_/\

Figure 2.

There is an important subgenre of humorous ASCII art that takes advantage of the names of the various characters to tell a pun-based joke.

+————————————————————————————+ | ^^^^^^^^^^^^ | | ^^^^^^^^^^^ ^^^^^^^^^ | | ^^^^^^^^^^^^^ ^^^^^^^^^^^^^ | | ^^^^^^^ B ^^^^^^^^^ | | ^^^^^^^^^ ^^^ ^^^^^^^^^^^^^^ | +————————————————————————————+ " A Bee in the Carrot Patch "

Figure 3.