A text file (sometimes spelled textfile : an old alternative name is flatfile ) is a kind of computer file that is structured as a sequence of lines of electronic text. A text file exists within a computer file system. The end of a text file is often denoted by placing one or more special characters, known as an end-However, on some popular operating systems such as Windows or Linux, text files do not contain any special EOF character.-A text file (sometimes spelled　textfile : an old alternative name is　flatfile ) is a kind of computer file that is structured as a sequence of lines of electronic text. A text file exists within a computer file system. The end of a text file is often denoted by placing one or more special characters, known as an end-However, on some popular operating systems such as Windows or Linux, text files do not contain any special EOF character.