I would like to map a keystroke to a cell and have it add up the number of
times the keystroke has been applied.

For instance if I touched the A key 3 times it would give me the value of 3
in one cell. If I touched the B key 2 times it would give me the value of 2
in another cell.

I'm thinking of using this in a laboratory situation. Where I could count
the different types of blood cells under a microscope using the keyboard.
Once I reached a total of a 100 diffent types of cells it would play a .wav
file that would alert me that the count of 100 had been reached.

Using a different key for each cell would allow me to diffentiate between
the different types of blood cells for a total of 100 overall.