K-rad literally means 1000 times rad
, just as a kbyte or kilobyte
refers to around 1000 bytes.
K-rad was made popular in the 1980s by computer hacker circles. The word 'rad' reffered to a radical act performed by a hacker which deserved congratulations.
The term k-rad originated around the same time people started talking in numbers l1k3 th15. This type of language first started apearing on BBS
es and FTP warez