In later versions of Unix, Ken Thompson would most certainly have been able to use upper-case characters but it's unclear whether he would have wanted to. It's not that Unix itself prevented it, but rather that there were still plenty of terminals at that time that supported only the 64-character ASCII character set, which were upper-case only.
The "7th ...
Yes, you could use uppercase and special characters in passwords in early Unix.
No, there was no Unix-related reason Ken Thompson wouldn’t have been able to use uppercase or special characters. Many of the passwords found in 2014 used special characters; none used uppercase, which doesn’t say anything about the original password requirements, only about the ...
The message appears in sudo’s revision control (in its current guise) in June 1993, in the University of Colorado version of sudo, in a slightly shorter form:
We trust you have received the usual lecture from the local Systems
Administrator. It usually boils down to these two things:
#1) Respect the privacy of others.
#2) Think before you ...
Adding a little information to the existing and accepted answer.
I concur with the answer that the STRETCH (the IBM 7030) was likely the first commercially-available computer to use ECC memory, in conjuction with the 7302 core storage.
For evidence that STRETCH had ECC, I point you to:
-- this description from 1959 -- see page 13, checking principles
The question is tricky in a fundamental way.
[...] very high uptime [...] longest continuous runtime
One part lies in the definition of these, partly contradicting, terms as well in what the computer is. Uptime is a term used for high level operating systems - such as a Unix system - but the Voyager systems are embedded computers running their ...
For the same reason you don't build a bridge by grabbing some metal and stone, dragging it to the shore of a river, and start stacking it and bolting it together.
Trying just to build and run the Analytical Engine from incomplete plans is about as likely to work or be useful as typing in an incomplete computer program and "just running it."
But worse, ...
Background: The Original PET Keyboard and PETSCII
Most of these keys have their roots in the original Commodore
PET 2001 keyboard:
The scanning and conversion was complex and seems to have
varied somewhat by ROM version, but eventually a PETSCII code would
be produced from a keypress. For the original keyboard, typing a key
with a printable character would ...