IBM AT 5170 Technical Reference page 477

pulse. A variation in the value of a quantity, short in relation to
the time schedule of interest, the final value being the same as the
initial value.
radio frequency (RF). An ac frequency that is higher than the
highest audio frequency. So called because of the application to
radio communication.
radix. (
1)
In a radix numeration system, the positive integer by
which the weight of the digit place is multiplied to obtain the
weight of the digit place with the next higher weight; for example,
in the decimal numeration system the radix of each digit place is
10. (2) Another term for base.
radix numeration system. A positional representation system in
which the ratio of the weight of anyone digit place to the weight
of the digit place with the next lower weight is a positive integer
(the radix). The permissible values of the character in any digit
place range from 0 to one less than the radix.
1'--""""
RAM.
Random access memory. Read/write memory.
random access memory
(RAM).
Read/write memory.
RAS. In the mM Personal Computer, row address strobe.
raster. In computer graphics, a predetermined pattern of lines
that provides uniform coverage of a display space.
read. To acquire or interpret data from a storage device, from a
data medium, or from another source.
read-only memory
(ROM). A
storage device whose contents
cannot be modified. The memory is retained when power is
r---..
removed.
read/write memory. A storage device whose contents can be
modified. Also called RAM.
Glossary-31