Complex sentence: The expos were among the largest in the computing industry, with attendance at some events reaching 100,000; as with cross-industry trade shows such as CES and COMDEX, World of Commodore shows were widely covered in computing magazines.
Split into simpler sentences: The expos were among the largest in the computing industry, with attendance at some events reaching 100,000. As with cross-industry trade shows such as CES and COMDEX, World of Commodore expos were widely reported on in computing magazines.