In D flip flop, D means DATA. In SR flip flop S means SET and R means RESET. What is the meaning of JK flip flop's J and K ?
Here's what wikipedia says: -
According to P. L. Lindley, a JPL engineer, the flip-flop types discussed below (RS, D, T, JK) were first discussed in a 1954 UCLA course on computer design by Montgomery Phister, and then appeared in his book Logical Design of Digital Computers. Lindley was at the time working at Hughes Aircraft under Dr. Eldred Nelson, who had coined the term JK for a flip-flop which changed states when both inputs were on. The other names were coined by Phister. They differ slightly from some of the definitions given below. Lindley explains that he heard the story of the JK flip-flop from Dr. Eldred Nelson, who is responsible for coining the term while working at Hughes Aircraft. Flip-flops in use at Hughes at the time were all of the type that came to be known as J-K. In designing a logical system, Dr. Nelson assigned letters to flip-flop inputs as follows: #1: A & B, #2: C & D, #3: E & F, #4: G & H, #5: J & K. Nelson used the notations "j-input" and "k-input" in a patent application filed in 1953.
Here is a link to a Jack Kilby biography that says he started at TI in 1958 and doesn't mention JK flip flops at all.
This TI website about Jack Kilby also doesn't mention JK flip flops either
If you look halfway down column 13 of this patent filed in 1953 (Granted 1958) you will see mention of inputs to a flip flop called J and K. This patent pre-dates Jack Kilby's time at TI by 5 years: -
Actually, the choice of the letters "JK" in the JK flip flop do have significance. The JK flip flop was named after Jack Kilby, the Texas Instruments engineer that invented the integrated circuit in 1958. The modified RS circuit that eliminated race conditions was named JK in his honor.
Search for "JK" and "Jack Kilby" simultaneously to see multiple sources for this.
A JK flip flop is a refinement of SR flip flop in that indeterminate state of the SR type is defined in the JK type.inputs J and K behave like inputs S and R to set and clear the flip flop (note that in a JK flip flop,the letter J is for set and the letter K is for clear).
Here jk stand for "jACK S.. Kilby " the founder of monolithic integrated circuit .
Here is more about Jack kilby and the first integrated circuit.
He was born in Missouri and earned degrees in electrical engineering from university of Illinois and university of Wisconsin.
In 1958 ,he worked at the centralab division of globe Union, In Milwaukee.
In 1958 he joined Texas Instruments in Dallas where he was responsible for integrated circuit development .
Kilby left Texas instruments in 1970.