Why are they called Lower Case and Upper Case in typing.?

Answer 1

On the original typewriter, the lower case letters were achieved by striking the key as it was normally on the typewriter just as you do on a keyboard - it produces a product that does not signify it is a proper noun or and abreviation for a group of words. In order to produce a capital letter for a proper noun or abreviation, I was necessary to hit the shift key which raised the part of the metal key striking the paper and this was caused the entire carriage of the typewriter to raise up into a different position. Releasing the shift key allowed it to go back to the lower position - thus, the capital letters were "upper" case because it required the shift to a different position and "lower" case was when the shift key was at rest or disengaged. Otherwise, you would have to have another complete set of keys for the capital letters and the key board would have 26 more keys at least.

Answer 2

on the old manual typerwriters
the letters were on the same striker

had to hit the "SHIFT" key to get the Upper case, or capitals,
to print (as the lower case were naturally in place)

and the whole mechanism MOVED to make the adjustment

Answer 3

It's not just in typing.
Capital letters are called 'upper case' letters; the others are called 'lower case' letters.
ABCDEFGHIJKLMNOPQRSTUVWXYZ (upper case)
abcdefghijklmnopqrstuvwxyz (lower case).
.

Answer 4

lower case means small alphabets of english and upper case means large letters of alphabets