Slashed letter O, unslashed letter zero

[Toby Thain]

On 2022-04-27 2:54 p.m., ben via cctalk wrote:
>  >
>  > Cut and paste.  Consider the S/360 Assembler (F) manual:
>  >
>  > 
> http://bitsavers.org/pdf/ibm/360/asm/C26-3756-2_Assembler_F_Programmers_Guide_196711.pdf 
> 
>  >
>  > Look at PDF page 10.   Note the box at the bottom of the page and how
>  > it's not even perfectly horizontal at the borders.  In fact, it looks to
>  > be hand-drawn.  I suspect that things were put together the old
>  > way--with scissors and rubber cement.
> 
> I was reading this one. Can't tell if hand drawn or not.
> http://www.bitsavers.org/pdf/ibm/360/asm/C28-6595-1_Assembler_E_Programmers_Guide_1966.pdf 
> 


All the diagrams apart from the ASCII art are hand-drawn (e.g. pages 14, 
19) - i.e. technical pens, rulers, T-squares, drawing board. With some 
paste-up for the Futura typesetting. And probably reduced from a larger 
drawing, by process camera to bromide at the correct size for these 
pages, and then pasted down as a 'mechanical' (as described by Paul).

As it happens I've recently been scanning some documents from this S/360 
documentation series...

--T

> Ben.
>