The OHP transparencies [1] that I used at Keele are at ftp://ftp.ox.ac.uk/pub/users/adrian/hardsoft.ps.gz Adrian [1] "Deliberate mistake" corrected :-) [2] I think that I have spelt it correctly this time. :-( -- A E Lawrence, MA., DPhil. adrian.lawrence@xxxxxxxxxxxxxx MicroProcessor Unit, 13, Banbury Road, Oxford. OX2 6NN. UK. Voice: (+44)-1865-273274, Fax: (+44)-1865-273275