Re: proportional spacing invented 1941
owl wrote:According to IBM they invented proportional back in 1941 not 1972 as claomed here. see following link
history IBM
Who here claimed it was invented in 1972?
Assuming you are referring to the Bush memo claims - there are 3 considerations to the claims:
1. The typewriter used proportional fonts.
2. The typewriter used a ball element.
3. The typewriter was available for use in the TANG.
The 1941 IBM machine doesn't meet #2.
The IBM Selectric Composer (circa 1968) meets #1 & #2 but most likely doesn't meet #3 (it was designed for and sold to printing shops and used by typesetters. It wasn't a standard office-use machine.).
The IBM Selectric II Correcting could meet all 3 criteria however it wasn't introduced until 1972.