3 questions about pre-compiled kernels in woody

[Paul E Condon <pecondon@peakpeak.com>]

I have a set of CDs for 30r1 (woody) on i386. 
I see in dselect that there are several packages that
use the 2.4.18 kernel. I have a classic pentium, which
seems to referred to as i586. There seem to be two
packages that provide kernel-image for this chip:

kernel-image-2.4.18-bf2 and
kernel-image-2.4.18tsc

Where can I find an explanation of the differences
between these two? 
What does 'bf2' stand for?
What does 'tsc' stand for?

TIA

-- 
Paul E Condon           
pecondon@peakpeak.com