lib/IPC/Open2.t See if IPC::Open2 works
lib/IPC/Open3.pm Open a three-ended pipe!
lib/IPC/Open3.t See if IPC::Open3 works
-lib/IPC/SysV.t See if IPC::SysV works
lib/less.pm For "use less"
lib/less.t See if less support works
lib/lib_pm.PL For "use lib", produces lib/lib.pm