If it is on the calender on your computer it usually means December but if its something else I don't know then , sorry.
Do you mean DEC phones?
In Greek Dec means ten
2nd Dec' 2011 : DSIP 8th Dec' 2011 : MC 13th Dec' 2011 : SS 18th Dec' 2011 : RAI 22nd Dec' 2011 : E-Com
Dec usually means December. If you think it might mean something else, you should ask your teacher.
Microsoft
IBM ITT DEC
dec 2011
That is usually credited to the DEC PDP-8
Some words that use 'dec' to mean by or with ten are:decadedecagramdecahedrondecaloguedecameterdecapoddecasyllabicdecathalondecigramdeciliterdecimaldecimeter
Do you mean a decibell? A unit for measuring sound.
A volunteer at the Computer History Museum in Mountain View, CA that worked on their DEC PDP-1 computer restoration project.While at MIT in the 1960s he worked on several things on their DEC PDP-1 computer:the background moving starfield for Spacewar!computer musicetc.
When you say that a computer has a 16 bit processor, you mean that the fundamental data size of the accumulator and registers is 16 bits. Examples of 16 bit processors include the DEC PDP-11, the Intel 8086/8088, and the MODCOMP Classic, circa 1980.