In the 1980s Howard developed the email service, Microtex. He also founded Australian Personal Computer, Australia's top-selling computer magazine. In 1988 he became an original investor in ISYS Search Software, one of the pioneer search engine products. In 1992 he sold his publications business to Australian Consolidated Press but retained Microtex. Microtex then became Oz-E-Mail. In 1994 businessmen Malcolm Turnbull and Trevor Kennedy invested and the business was relaunched as OzEmail, with range of Internet services. In 1996 OzEmail was listed on the Nasdaq stock exchange. In 1997 OzEmail phone was launched and in 1998 the company was listed on the Australian Stock Exchange.
In December 1998 American telco WorldCom took a 14.9% stake in OzEmail and in March 1999 WorldCom completed the acquisition for a total of $520 million. In July 2002 WorldCom declared bankruptcy and sold the Australian ISP business to iiNet in 2005 for $110 million.
In 2000 Howard joined the board of the telco Optus as a non-executive director. He was a director of the WebCentral Group, a web and application hosting company when it was taken over by Melbourne IT in 2006.
- Head, Beverley (14 October 2002). "A decade of life with OzEmail". Sydney Morning Herald. Retrieved 24 December 2013.
- Bustos, Luisa (5 March 1999). "MCI WorldCom seals OzEmail deal". Computerworld. Retrieved 24 December 2013.
- Dahdah, Howard (15 February 2005). "iiNet snaps up OzEmail for $110 million". PC World (ARN Net). Retrieved 24 December 2013.
- "CWO snaps up Howard". Computerworld. 1 June 2000. Retrieved 24 December 2013.
- LeMay, Renai (22 May 2006). "Melbourne IT to buy WebCentral". ZD Net. Retrieved 24 December 2013.
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