National Instruments DIO 6533 - Manual (Page 119)

Glossary
© National Instruments Corporation G-11 DIO 6533 User Manual
of the output drivers can drive the resulting connection low. Also called
an open-collector or open-drain driver.
word the standard number of bits that a processor or memory manipulates at
one time. Microprocessors typically use 8, 16, or 32-bit words.
working voltage the highest voltage that should be applied to a product in normal use,
normally well under the breakdown voltage for safety margin