What version of DOS did the 5150 sell with?

[generic486]

Yes, I have noticed that noise with my AT. I'm sure it's due to the solenoid at the back of the drive.
Yes, I noticed there was quite a bit of upset at the release of the PS/2. Most of this documented in the Computer Chronicles episode.
Also, my F AT keyboard was produced in the UK, opposed to the standard US so maybe they had the factory open longer there like wit the Model M's where US opererations were spun off into Lexmark and then sold to Unicomp in 96. However the IBM factory in Scotland continued producing Model M until 1999.
Also, I've found an IBM branded copy of DOS 3.30 that looks to be a perfect fit for the 5150.

 

[SpidersWeb]

It looks like you are one year off. 1987 was when IBM replaced the PC with the PS/2.

Yep. Also I realised my 1987 5160 was made in the US, and my 5150 from late 1986 was made in Australia, and perhaps the new fancy half height technologies hadn't quite got to IBM Australia at that time.

 

[Beerhunter]

PC DOS 2.1 came out on November 1, 1983 along with the IBM PCjr.

To support jr's half-height drives. (Timing issues.)