it's not uncommon knowledge!
typewriters at first came in countless designs, (before 1 or 2 styles began to dominate.)
at first, (like computer operating systems) you needed to find a typist (and actualy at first, 'typewriter' was the operater, not the machine) who was proficient on the style of machine you owned (but some typist would provide their own machines!) (just as in the beginning of computers there were Lainer Os, Wang Os, DOS, and (senior moment--the 3 letter one used on main frames and adapted for PC's?)
and eventually things settled down (thought there are still more OS's than most users think, (linux, Mac, MSDos, (and its spawn))
Still, (getting back to typewriters) all of these mechanical devices , with springs and levers and tie rods, would jam if you typed too fast.
so manufacturers made them harder to use (to slow typist down) and provided free training on how to use them.
and over time the qwerty (named for top row of left hand keys) became the standard lay out (since electronic devices, and computer have been around, there are more logical layout available, but since most of use know how to type with a querty board, it remains dominant. (you can readily find other layouts if you want--they often are premiumly prices, and require you to relearn how to type.)
the qwerty board, has the the vowels intentionally hard to to type. it has the vowels under awkward fingers. (a under left pinky, e is worked with left middle finger, i and o under middle and ring finger of right hand, but these require movemtent to reach.. U (the least used vowel) is the easiest to type, (a movement to reach it, but it is typed with right index finger )
i am sure wiki or other sites (perhaps IBM) have info on the history of the typewriters and keyboard lay outs.
some other lay outs are available as software download, (and you just learn to ignore the letters printed on the keys!)
