You can customize your 20b to display your name when it turns ON by doing the following:
shift mode UP UP UP (select the language) SHIFT UP.
The screen then becomes blank and you are ready to enter your name (up to 8 characters). Use the UP and down arrow to select a letter, INPUT to validate the letter and = to erase the last letter and ON to exit.
For example to enter CDB, press UP INPUT UP UP INPUT UP UP UP . Once you have entered your name, press SHIFT OFF and then ON again and your name will display.
From the July HP Solve newsletter...
My 20b now displays "GENE" when I turn it on.
Available characters are:
Capital A through Z and lowercase A through Z.
@?>=<;:/.-,+*)('&%$#"!
and many others including many Greek letters.
Space and divide symbol
Numerals 0 through 9
and then non-English letters.
I am not aware of any way to do anything else with these characters at the moment.
Edited: 25 June 2008, 10:50 p.m. after one or more responses were posted