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2 File Associations

.123 File Extension

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Lotus 1-2-3 Spreadsheet Icon
File TypeLotus 1-2-3 Spreadsheet
3.1 (15 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategorySpreadsheet Files
File Format Description

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.

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.

Program(s) that open .123 files
Updated 11/6/2013

Generic Icon
File TypePCB123 Circuit Board Design
DeveloperSunstone Circuits
1.7 (3 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryCAD Files
File Format Description

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.

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

Program(s) that open .123 files
Updated 11/12/2009