chicken head
[Commodore] n. The Commodore Business Machines logo, which strongly resembles a poultry part. Rendered in ASCII as `C='. With the arguable exception of the Amiga (see {amoeba}), Commodore's machines are notoriously crocky little {bitty box}es (see also {PETSCII}). Thus, this usage may owe something to Philip K. Dick's novel `Do Androids Dream of Electric Sheep?' (the basis for the movie `Blade Runner'), in which a `chickenhead' is a mutant with below-average intelligence.
chiclet keyboard
n. A keyboard with small rectangular or lozenge-shaped rubber or plastic keys that look like pieces of chewing gum. (Chiclets is the brand name of a variety of chewing gum that does in fact resemble the keys of chiclet keyboards.) Used esp. to describe the original IBM PCjr keyboard. Vendors unanimously liked these because they were cheap, and a lot of early portable and laptop products got launched using them. Customers rejected the idea with almost equal unanimity, and chiclets are not often seen on anything larger than a digital watch any more.
chine nual
/sheen'yu-*l/ [MIT] n.,obs. The Lisp Machine Manual, so called because the title was wrapped around the cover so only those letters showed on the front.