A revision of R3RS, revised in R3.99RS. (ftp://altdorf.ai.mit.edu/). ["The Revised^4 Report on the Algorithmic Language Scheme", W. Clinger et al, MIT (Nov 1991)]. (1994-10-28) [Later revisions?]
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
