IIRC, that file CORE303.EXE in the UTellMe directory is an old DOS disk
performance test from Core International, long since absorbed by Aiwa.
Core made disk controllers, and disk drives, and later tape drives. The
CORETEST program was a means of contrasting the performance between your
current rig and (ostensibly) one of Core's setups. I'm not entirely sure
that Core actually made all of their disk drives or if some or all were
rebadged. But, at one time, CORETEST numbers were widely quoted as a
measurement of performance.
At any rate, be careful. At one time, CORE303 was widely distributed
publicly and many copies are infected with a boot-sector virus.
Cheers,
Chuck