from
The Free On-line Dictionary of Computing (8 July 2008)
hole model
<electronics> A {model} of semiconductor behaviour in which
{donors} contribute a positive charge equal in magnitude to
the charge of an {electron}, and {acceptors} contribute space
for such a charge within the crystal lattice. Honored by
history well before electrons were discovered and described,
much of {electronics}, especially at the engineering level,
continues to consider {current} as flowing from positive to
negative.
(1995-10-05)