Related:

• waldo /wol'doh/ n. [From Robert A. Heinlein's story "Waldo"] 1.
  A mechanical agent, such as a gripper arm, controlled by a human limb....
• foo /foo/ 1. interj. Term of disgust. 2. [very common] Used very generally as a sample name for absolutely anything, esp.
  programs and files (esp. scratch files). 3. First on the standard list of metasyntactic variables used in syntax examples....
• metasyntactic variable n. A name used in examples and understood to stand for whatever thing is under discussion, or any random member of a class of things under discussion.
  The word foo is the canonical example. To avoid confusion, hackers never (well, hardly ever) use `foo' or other words like it as permanent names for anything....
• bar: /bar/ n. 1. The second {metasyntactic variable}, after {foo} and before {baz}.
  Suppose we have two functions: FOO and BAR. FOO calls BAR....
• quux: /kwuhks/ [Mythically, from the Latin semi-deponent verb quuxo, quuxare, quuxandum iri
  oun form variously `quux' (plural `quuces', anglicized to `quuxes') and `quuxu' (genitive plural is `quuxuum', for four u-letters out of seven in all, using up all the `u' letters in Scrabble)....
• bar /bar/ n. 1. [very common] The second metasyntactic variable, after foo and before .
  ..." 2. Often appended to foo to produce foobar....
• qux: /kwuhks/ The fourth of the standard {metasyntactic variable}, after {baz} and before the quu(u.
  ..)x series. See {foo}, {bar}, {baz}, {quux}. This appears to be a recent mutation from {quux}, and many versions (especially older versions) of the standard series just run {foo}, {bar}, {baz}, {quux}, ....
• hud: n. 1. Yet another {metasyntactic variable} (see {foo}).
  It is reported that at CMU from the mid-1970s the canonical series of these was `foo', `bar', `thud', `blat'....
• quux /kwuhks/ n. [Mythically, from the Latin semi-deponent verb quuxo, quuxare, quuxandum iri
  oun form variously `quux' (plural `quuces', anglicized to `quuxes') and `quuxu' (genitive plural is `quuxuum', for four u-letters out of seven in all, using up all the `u' letters in Scrabble)....