HP's last Woodstock model.  A very cute little unit!  Like all
the Woodstocks
very small and handy.  Compared to the HP-25C it is much more powerful
and
overcomes all of the former's programming limitations: Twice as much
program
memory, subroutine calls, numeric labels, instruction insertion and
deletion
and more.  Most importantly it fixes the HP-25C's number termination bug
-
or was that a feature? 
The only thing that didn't change compared to the HP-25C is execution
speed. 
When compared with Classic models it falls in the category of the HP-67
but
lacks the card reader.  Compared to Voyager models it's feature
set comes close to the HP-11C.
Feature wise the unit is identical to the HP-19C.