.123 File Overview

File Extension:	123
File Type Description:	Lotus 1-2-3 Spreadsheet
File Type Developer:	IBM
Primary Associated Software:	Apache OpenOffice
Primary Software Developer:	Apache Software Foundation

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Home File Types Spreadsheet Files 123

What is File Extension 123?

Open Source developed the 123 file extension, also know as a Lotus 1-2-3 Spreadsheet file, for the Gnumeric software package. Annoymous user data statistics infer that 123 files are most popular in China and with those using Windows 10 devices. A high percentage of these users browse the web using Google Chrome.

Associated Developers and Software

	Gnumeric by Open Source
	NeoOffice by Planamesa Software Inc.
	PCB123 by Sunstone Circuits
	Lotus 1-2-3 by IBM
	Apache OpenOffice by Apache Software Foundation

Top 123 User Languages

Top 123 File User Browsers

Desktop Friendly?

Mobile Friendly?

Top User Operating Systems


Windows 10	Windows 11	Windows 6	Windows 8.1

Associated Operating Systems

	Windows
	Mac
	Android
	Linux

Other File Types Related to 123 Files

Extension	File Type Developer	File Category	File Type Description
.WR!	IBM	Spreadsheet Files	Lotus 1-2-3 Spreadsheet
.WK!	IBM	Spreadsheet Files	Lotus 1-2-3 Spreadsheet
.FAQ	The Document Foundation	3D Image Files	Frequently Asked Questions Document
.XLB	Microsoft Corporation	Settings Files	Excel Toolbars File
.POT	Microsoft Corporation	Data Files	PowerPoint Template
.DON	Apache Software Foundation	Data Files	Apache OpenOffice (OpenOffice.org) Log
.SDV	Pinnacle Systems Inc.	Video Files	Studio DV Project File
.OTS	Apache Software Foundation	Spreadsheet Files	OpenDocument Spreadsheet Template
.HRL	Ericsson Computer Science Laboratory	Developer Files	Erlang Header File
.SDI	Intuit, Inc.	Data Files	QuickBooks Data File