release dates of early microcomputer operating systems, incl. Intel ISIS

Nigel Williams nw at
Tue Sep 15 03:31:58 CDT 2015

On Tue, Sep 15, 2015 at 5:47 PM, Eric Smith <spacewar at> wrote:
> On Twitter, @hotelzululima suggested Motorola MIKBUG, introduced in
> 1974, but IMO it's a monitor, not an operating system.

Given the constraints of the systems of that time (speed, memory size,
peripheral support) the line between monitor and "operating system"
might be tricky to specify.

Here's another interesting marginal candidate:


A three board Omnibus set that contained an Intel 8008, memory and IO
- it had a resident monitor on the KC341 control panel.

More information about the cctalk mailing list