Stack-Oriented programming is a programming paradigm that utilizes a stack machine model, where operations are performed using a Last In, First Out (LIFO) order. The first Stack-Oriented Programming Language, Forth, was developed in 1970, and Factor followed in 2003. This paradigm often employs Reverse Polish Notation (RPN), where operands are placed before operators, and requires special keywords for stack manipulation, allowing users to extend language functionality by creating new words akin to functions. An example in Forth demonstrates using RPN to manage stack operations, while Factor is used to showcase stack manipulation techniques such as duplication and rotation. Language extension in Forth involves creating new commands that operate on stack values, as illustrated by defining custom words for specific operations. Furthermore, a Factor application example demonstrates creating a Fibonacci sequence generator, highlighting the use of various stack operations to compute and display the sequence. The text also invites readers to explore related programming paradigms and encourages participation in live streams for a more interactive learning experience.