And Ma Bell only allowed herself to be broken up because she wanted to get into computing, as in consumer and commercial data processing/home computing. She was forbidden from doing that as part of being allowed to exist as a monopoly (basically because there was enough money that AT&T could simply outspend every other entity in the world.)
AT&T's first "consumer" product post-breakup was a crap-tier rebranded Olivetti PC which didn't go anywhere, along with some 3B20 devices that made it into the wild. The entry into computing failed hard because there were already better alternatives and Ma's offerings were subpar, showing that the breakup was (at the time,) useless. There wasn't much more computer stuff from Bell other than Plan 9, which went nowhere.
The government tried many times before that to break up the system, but Ma would literally send trainloads of paperwork until the government just went "We can't even begin." Now, AT&T is bigger than the original Bell System, with GTE (Verizon) swallowing up a lot of the remaining portions, and U.S. West (Qwest) being the rest.
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