### Clue: Inventor to shout with information technology beginning to happen? (9)
### Answer: HOLLERITH 
 ### Explanation: Definition: Inventor
 HOLLER(to shout/to yell) **plus**(with) IT(abbrev. for "information technology") + **1st letter of**(beginning to) "happen".
Defn: … of an electromechanical tabulating machine for punched cards.