from
Jargon File (4.4.4, 14 Aug 2003)
shelfware
/shelf'weir/, n.
Software purchased on a whim (by an individual user) or in accordance
with policy (by a corporation or government agency), but not actually
required for any particular use. Therefore, it often ends up on some
shelf.
from
The Free On-line Dictionary of Computing (8 July 2008)
shelfware
<jargon> /shelfweir/ {Software} which is never used and so
ends up on the shelf. Shelfware may be purchased on a whim by
an individual, or in accordance with corporate policy, but not
actually required for any particular use. Alternatively, it
may be software that has been developed (unlike {vaporware}),
but is never released as a product -- a common occurrence at
{DEC}.
[{Jargon File}]
(1997-07-20)