Cal Henderson

Cal Henderson
Cal Henderson in 2010
Born
Callum James Henderson-Begg

17 January 1981 (1981-01-17) (age 43)
NationalityBritish
Occupation(s)computer programmer, author

Callum James Henderson-Begg (born 17 January 1981), known as Cal Henderson, is a British computer programmer and author based in San Francisco.