C.I.T.
The Thomas J. Watson, Jr. Center for Information Technology at Brown University. Click here for a picture.

Rex
Rex (not REXX) is a programming language developed by Brown University Professor Leslie Kaelbling that forces AI programmers to write code that allows agents to respond to a dynamic environment in real time. To write a Rex program you must write a LISP program which, when executed, creates the Rex program.

RLE
RLE (Run Length Encoding) is a common compression technique used when there are long strings of repeated values. To run-length encode a string of identical values, a special "escape" value is inserted at the beginning of the string followed by the number of times to repeat a value and the value to be repeated. For example, if we use 0 as our escape value, we might run-length encode the string of values:

3 3 3 3 3 3 3 3 3 5 5 5 5 5 5 8 7 4 4 4 4 4 4 4 4 2 0

as follows:

0 9 3 0 6 5 8 7 0 8 4 2 0 1 0