Q: What are ANSI flowcharting, Warner/Orr diagrams, and Pseudocode?
A: ANSI Flowcharting, or anything else which is labeled or prefaced by the name ANSI, is something which is regulated by and adheres to prescribed methods developed by the American National Standards Institute. Most of the computer world adheres to a great number of ANSI methods, including color attributes, character sets and programming conventions.
Pseudocode is handwritten English which many programmers use to help them cross the bridge between thinking like a human and thinking like a piece of logical machinery. Once your routines are written out in a language that YOU understand fluently, you can more easily translate those routines into language that either your computer, or its compilers, can understand. Translating is always easier than simply trying to create something from scratch in a foreign environment.
Warner/Orr Diagrams? Got me! I'm sure someone else will have an answer for you, though! :)