The secret British Colossus computers -LRB- NUMBER@1 -RRB- PERSON@1 , ed. , Colossus : The Secrets of LOCATION@1 's ORGANIZATION@1 , ORGANIZATION@2 , NUMBER@2 , which had limited programmability but demonstrated that a device using thousands of tubes could be reasonably reliable and electronically reprogrammable .

The secret British Colossus computers -LRB- NUMBER@1 -RRB- , PERSON@1 , ed. , Colossus : The Secrets of LOCATION@1 's ORGANIZATION@1 , ORGANIZATION@2 , NUMBER@2 which had limited programmability but demonstrated that a device using thousands of tubes could be reasonably reliable and electronically reprogrammable .
