What did computers without screens do?

[Diane Bruce]

On Wed, Dec 16, 2015 at 04:47:33PM -0700, ben wrote:
> On 12/16/2015 1:29 PM, Mike Stein wrote:
> 
> > So you can definitely do lots of useful stuff without a screen,

Old thread, but I remember writing a tic-tac-toe program for the 1401
using the sense switches and lights. Does that count as a display less
computer?

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