The Working memory reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)
Working memory, also called transient memory, is
1. Transient Store - Sensory Register (Atkinson & Shiffrin)
ÃÂ÷ Visual (Iconic); Acoustic (Echoic); and Haptic (touch)
ÃÂ÷ Up to 0.5 second
ÃÂ÷ Sperling & Neisser demonstration
(submitted by B.Kharel)