| File extension Name |
extension description |
| .1 | Super Nintendo Multi-part Game-console ROM Image (1, 2, 3, etc.) (Nintendo) |
| .1 | Screen Log File |
| .1 | Stuffit Archive File (Aladdin Systems, Inc.) |
| .1 | (1..Any Number) Might be Part of a Version Number |
| .1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1 | Mozilla (Netscape) Cookie, Image, Popup Permissions (Mozilla.org) |
| .1 | The File Splitter Split File Portion (Dekabyte) |
| .1 | Roff/nroff/troff/groff Manual Source (UNIX) |
| .1 | WebOutfitter Service Verification Utility (Intel) |
| .1 | Pro/ENGINEER Backup File (PTC) |
| .1 | Inno Setup Binary File |
| .1-1 | Likely a Section of an ASCII File |
| .1-C | Graphlib URT File |
| .1-P | PNG File |
| .1-STEP | 1-Step Backup (Iomega) |
| .10 | IBM Voice Type Language Script Data File |
| .10 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .10 | Salt Lake City Game Music file |
| .100 | Award BIOS Upgrade File Version 1.0 |
| .100 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .100 | Designer Graphics File |
| .101 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .101 | OmniPage OCR File (Nuance Communications, Inc.) |
| .102 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .102 | OmniPage OCR File (Nuance Communications, Inc.) |
| .103 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .103 | OmniPage OCR File (Nuance Communications, Inc.) |
| .104 | OmniPage OCR File (Nuance Communications, Inc.) |
| .104 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .105 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .106 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .107 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .108 | OmniPage OCR File (Nuance Communications, Inc.) |
| .108 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .10O | Embroidery File |
| .10X | Gemini Bitmap Printer Graphics File |
| .11 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .11 | IBM Voice Type Language Script Data File |
| .11 | Salt Lake City Game Music file |
| .110 | OmniPage OCR File (Nuance Communications, Inc.) |
| .110 | Award BIOS Upgrade File Version 1.1 |
| .111 | Winfunktion 8 Grafik Julia1 File |
| .112 | Winfunktion 8 Grafik Julia1 File |
| .113 | Iomega Backup File (Iomega) |
| .118 | Winfunktion 8 Grafik Julia1 File |
| .11KHZ | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .12 | IBM Voice Type Language Script Data File |
| .12 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .12 | Salt Lake City Game Music File |
| .120 | Award BIOS Upgrade File Version 1.2 |
| .1212 | Crypto Shell Extensions Certificate Revocation List |
| .123 | 1-2-3 Spreadsheet (IBM) |
| .124 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .128 | OmniPage OCR File (Nuance Communications, Inc.) |
| .129 | Winfunktion 8 Grafik Julia1 File |
| .12M | 1-2-3 Smartmaster File (IBM) |
| .12U | PageMaker Font (Adobe Systems Incorporated) |
| .13 | Salt Lake City Game Music file |
| .13 | IBM Voice Type Language Script Data File |
| .13 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .130 | Winfunktion 8 Grafik Julia1 File |
| .130 | Award BIOS Upgrade File Version 1.3 |
| .133 | Winfunktion 8 Grafik Julia1 File |
| .137 | Winfunktion 8 Grafik Julia1 File |
| .139 | Winfunktion 8 Grafik Julia1 File |
| .14 | IBM Voice Type Language Script Data File |
| .14 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .14 | Salt Lake City Game Music File |
| .140 | Award BIOS Upgrade File Version 1.4 |
| .14000K | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .143 | Winfunktion 8 Grafik Julia1 File |
| .145 | Winfunktion 8 Grafik Julia1 File |
| .149 | Winfunktion 8 Grafik Julia1 File |
| .14K | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .15 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .15 | Salt Lake City Game Music File |
| .15 | IBM Voice Type Language Script Data File |
| .150 | Award BIOS Upgrade File Version 1.5 |
| .1500 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .151 | Winfunktion 8 Grafik Julia1 File |
| .1510 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .153 | Winfunktion 8 Grafik Julia1 File |
| .159 | Winfunktion 8 Grafik Julia1 File |
| .15U | PageMaker Printer Font (Adobe Systems Incorporated) |
| .16 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .16 | IBM Voice Type Language Script Data File |
| .16 | Salt Lake City Game Music File |
| .16 | ISOLINUX Splash Screen Graphic |
| .160 | OmniPage OCR File (Nuance Communications, Inc.) |
| .163 | Winfunktion 8 Grafik Julia1 File |
| .167 | Winfunktion 8 Grafik Julia1 File |
| .16700K | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .169 | Winfunktion 8 Grafik Julia1 File |
| .16PLUS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .16_ | Ntgraph Setup File |
| .17 | IBM Voice Type Language Script Data File |
| .17 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .170 | Award BIOS Upgrade File Version 1.7 |
| .17200K | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .17400K | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .175 | Winfunktion 8 Grafik Julia1 File |
| .17600K | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .18 | Salt Lake City Game Music File |
| .18 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .18 | IBM Voice Type Language Script Data File |
| .180 | Award BIOS Upgrade File Version 1.8 |
| .183 | Winfunktion 8 Grafik Julia1 File |
| .187 | Winfunktion 8 Grafik Julia1 File |
| .19 | IBM Voice Type Language Script Data File |
| .19 | Salt Lake City Game Music file |
| .19 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .190 | Award BIOS Upgrade File Version 1.9 |
| .191 | Winfunktion 8 Grafik Julia1 File |
| .196 | Computer Snooper Log File |
| .1990 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1991 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1992 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1993 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1994 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1A | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1A0 | Award BIOS Upgrade File Version 1.A |
| .1AU | Wave AFSP Man Audio File |
| .1B | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1C | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1C0 | Award BIOS Upgrade File Version 1.C |
| .1D1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1DK | OS/2 Saved SKF Format File (IBM) |
| .1FP | SpiffyCharts Data File (NTech) |
| .1G | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1L | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1M | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1MEG | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1OF2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1PE | TurboTax Form File (Intuit) |
| .1PH | TurboTax (Intuit) |
| .1PS | Man PS File |
| .1SC | Bio-Rad Scan File (Bio-Rad Laboratories, Inc.) |
| .1ST | Information |
| .1T | Fortran File |
| .1T | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .1TX | 1toX File (Logipole) |
| .1WSW | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |