$1 file extension is for ZX Spectrum file in HOBETA format




Similar to $1

1 - Unformatted manual page Roff/nroff/troff/groff
10X - Gemini 10x printer graphics file - Bitmap graphics
123 - Lotus123 Data file
12M - Lotus123 Smartmaster file
15U - Printer font with PI font set PageMaker
1ST - Usually README.1ST text
24B - 24bit data Bitmap graphics

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