Complex sentence: A number of monitors with A.b connectors started appearing in the mid- 90's, but this was at about the same time USB was being created and the vast majority of computer companies ignored A.b and instead waited for USB.
Split into simpler sentences: A number of monitors with A.b connectors started appearing in the mid- 90's, but this was at about the same time USB was being created. The vast majority of computer companies ignored A.b and instead waited for USB.