Manual
Naming a DOS Text File,
DOS File Names. All documents created in Text File Editor are DOS text files.
Give them names that follow the DOS rules for naming files: up to eight
characters long, no spaces, followed by a period and three more characters.
Use TXT following the period to indicate your file is a text file. For more
information, see Naming a DOS File in Getting Started (Book 1).
Text File Editor 208