Gary Bernhardt, says services, or service objects, are stateless objects with no data but behaviors associated with them.
Avdi said that they were a meaningless term (or something like that).
Like Avdi in podcast-giant-robots-39-avdi-grimm the guys think that the name is meaningless.
Service objects... the name is meaningless. One of the guys thinks that it should just be "objects". The other guy still puts them in the "services" directory, despite agreeing.
Service objects are procedural
blog-post-gourmet-service-objects
blog-post-what-service-objects-are-not
blog-post-7-ways-to-decompose-fat-activerecord-models
blog-post-enough-with-the-service-objects-already