Meaning of SUB-20?

[Student]

Hello,

I have bought SUB-20 and use him for some things of my diploma thesis.
Now I have the question:
What exactly means "SUB-20", because I will have to explain this namely in the diploma thesis...

[xol]

( I wish I knew it as well). It was a long time ago and as far as I remember it was:

S- Serial (interfaces) to
U- USB
B- adapter Board
20 - USB 2.0 Compliant