twenty-nine feature

twenty-nine feature

[¦twen·tē¦nīn ′fē·chər]
(computer science)
A device used on some punched-card machines to represent values from 0 through 29 by a maximum of two punches on a single column; x and y punches represent 10 and 20, and these are added to punches in positions 0 through 9.