This document summarizes a seminar on Ruby programming. It introduces Ruby as a scripting language created by Yukihiro Matsumoto in the mid-1990s. Ruby is an object-oriented, dynamic language that allows for rapid development and prototyping. The seminar covers Ruby's history, overview, tools needed, differences from other languages, advantages like clean code and easy learning, disadvantages like slower development, and provides an example Ruby program to calculate factorials.