He also worked in journalism, and was a founding member of the Internet Press Guild.

[4] O'Reilly book author Roger A. Grimes described Flushot Plus as "the first holistic program to fight MMC [malicious mobile code]".

[9] Greenberg attended the State University of New York at Stony Brook, graduating in 1978.

[9] In late 2009, after his condition became too challenging for his family to care for him, Greenberg moved to a nursing home near Atlanta, Georgia.

In August 2015, he was moved to Chelsey Park Health and Rehabilitation Center, Dahlonega, Georgia,[9] where he died after contracting pneumonia,[citation needed] in February 2017.