tl;dr

• Some people argue that a Unix "process" is spiritually closest to a Smalltalk "object" because it can receive signals and do some IPC or whatnot to parallel "messages"

This guy maps it as:

• Unix "directory" = Smalltalk "object"
• Unix "executable" (in a "directory") = Smalltalk "method"

a working example in his git repo: https://github.com/jdjakub/smalltix