Here's a more detailed biography of Jack Dorsey:
Early Life and Education
Jack Dorsey was born on November 19, 1976, in St. Louis, Missouri, to Tim and Joyce Dorsey. His father was a financial advisor, and his mother was a nurse. Dorsey grew up in a family of modest means, and his parents encouraged his interest in computer programming from an early age.
Dorsey attended Central Methodist College in Fayette, Missouri, where he studied computer science and graduated in 1999 with a Bachelor of Arts degree. During his time at college, Dorsey became interested in programming and began to teach himself how to code.