6.4 FOSSIL drivers

     A FOSSIL (or Fido/Opus/SEAdog Standard Interface Layer) driver is
     a memory resident program that works as a layer between the
     application program and your computer's hardware. The Mailer (FD)
     requires a FOSSIL driver to function. One of the advantages of
     the standard FOSSIL interface is that programs can be ported
     easily to other machines and/or operating systems.

     There are several FOSSIL drivers available. The Mailer (FD) has
     been tested with OpusComm, X00, and BNU with good results. X00
     and BNU will be described here.