Home : File Types : 123 File (2 File Associations)

.123 File Extension

File Type 1Lotus 1-2-3 Spreadsheet

3.5 (24 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategorySpreadsheet Files


This file is saved in a binary format, which requires a specific program to read its contents.

What is a 123 file?

Spreadsheet created by Lotus 1-2-3, part of IBM Lotus SmartSuite; organizes data in rows and columns; functions can be applied to the data in various cells, which can automatically populate the data in other cells.

More Information

Lotus 1-2-3 was first developed by Lotus Development Corporation, which was bought by IBM in 1995. The "1-2-3" refers to the program's three main capabilities: 1) spreadsheet functions, 2) creating charts and graphs, and 3) basic database operations.

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Programs that open 123 files
IBM Collaboration Solutions
Corel Quattro Pro X8
Apache OpenOffice
Planamesa NeoOffice
Apache OpenOffice
Apache OpenOffice
Updated 11/6/2013

File Type 2PCB123 Circuit Board Design

DeveloperSunstone Circuits
2.7 (7 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryCAD Files


File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

.123 File Association 2

Printed circuit board (PCB) layout created with PCB123, a PCB design program; contains a circuit board design, which can include multiple components; supports 2, 4, and 6-layer circuit boards with soldermask and silkscreen options.

More Information

Completed PCB123 designs can be sent to Sunstone Circuits for manufacturing. Assembly quotes are provided within the program.

Programs that open 123 files
Updated 11/12/2009

.123 Extension Information

This page contains information about the file extension 123 and its known file associations. Our goal is to help you understand what a *.123 file is and how to open it.

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