The MIT V6+ system had it. They probably took it out of the distro because it was useless without the dictionary, which they didn't have the rights to distribute. Here's the source: http://ana-3.lcs.mit.edu/~jnc/tech/unix/s2/spell.c http://ana-3.lcs.mit.edu/~jnc/tech/unix/s2/spell1.c http://ana-3.lcs.mit.edu/~jnc/tech/unix/s2/spell2.c http://ana-3.lcs.mit.edu/~jnc/tech/unix/s2/spell3.c Noel