Rich,
The IBM Selectric came a lot later than the Teletype printers that were usi=
ng a cylinder holding the letters.
When the IBM patent expired, a lot of company started to make clones.

Later, the dot matrix printer replaced them before the laser and inkjet too=
k over the printing market.

Jean-Paul
AC9GH

> On Mar 16, 2015, at 11:05 PM, Richard R. Pope <mechanic_2@charter.net> wr=
ote:
>=20
> Harold,
>     That makes sense. In fact after I wrote my last message I was=20
> sitting here thinking and I remembered that we were time sharing on an=20
> IBM 370/70. So it would only be natural for the teletype machine to be=20
> an IBM. Ah, I now know what the make is. If only I could remember the=20
> model. Oh, well.
> Thanks,
> rich!
>=20
> On 3/16/2015 9:55 PM, Harold Hallikainen wrote:
>> I suspect "golf ball" printers were derivatives of the IBM Selectric
>> typewriter. Those were mechanically amazing.
>>=20
>> Harold
>>=20
>=20
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