Bing found the following results
How to Create a Text File - Computer Hope
What Is a Text File? - Lifewire
Text file - Wikipedia
TXT File - What is a .txt file and how do I open it? - FileInfo.com
TEXT File - What is a .text file and how do I open it? - FileInfo.com
Text File Formats - FileInfo.com
What Is a Text File? | phoenixNAP IT Glossary
Understanding Text File Types: A Comprehensive Guide
Text File Format - What Is A .TXT And How to Open It | Adobe
What Is Plain Text? - How-To Geek