It maens that JK meets LM at right angles of 90 degrees
what is IS-LM?
LM is a manufacturer's code--all LM chips were made by National Semiconductor. Similarly, SN chips were made by Texas Instruments.
New LM was created in 1976.
The "LM" stands for Linear Monolithic" and is just part of the part-number that National decided to use for this famous timer IC. The LM prefix is still used for a lot of medium complexity analog chips, like regulators and op-amps.
LM stands for "Linear Monolithic"
The LM pilot is the person who pilots the Lunar Module, the mini-space ship that lands on the Moon. "LM" = Lunar Module.