impress

n : the act of coercing someone into government service [syn: {impressment}]

v 1: have an emotional or cognitive impact upon; "This struck me

as odd" [syn: {affect}, {move}, {strike}]

2: impress positively; "The young chess player impressed her

audience"

3: make a deep and indelible impression on someone [syn: {ingrain},

{instill}]

4: mark or stamp with or as if with pressure; "To make a batik,

you impress a design with wax" [syn: {imprint}]

5: reproduce by printing [syn: {print}]

6: take (someone) against his will for compulsory service, esp.

on board a ship; "The men were shanghaied after ebing

drugged" [syn: {shanghai}]

7: dye (fabric) before it is spun [syn: {yarn-dye}]

compress

When used without a qualifier, generally refers to

{compression} of a file using a particular {C} implementation

of compression for {Unix} by Joseph M. Orost, James A. Woods

et al. widely circulated via {Usenet}. compress uses the

{Lempel-Ziv Welch} {algorithm} and normally produces files

with the suffix ".Z".

Compress uses variable length codes. Initially, nine bit

codes are output until they are all used. When this occurs,

ten bit codes are used and so on until an implementation

dependent maximum is reached.

After every 10 kilobytes of input the compression ratio is

checked. If it is descreasing then the entire string table is

discarded and information is collected from scratch.

[{Jargon File}]

(1996-10-20)