This book is written for computer users who want a reference detailed enough to help them to learn about Ubuntu MATE and its applications and to build their confidence and competence in using them to get things done. It is written from the perspective that Ubuntu MATE is a typical modern Linux for the average computer user who needs to do things like browse the Internet, check email, use a text editor or word processor, read and store document files, view and edit photos, watch videos, listen to music, and subscribe to podcasts. Many of the examples in this book are from my own experiences using Linux. The applications discussed work in the same way regardless of the operating system.