.123

File Type 1 Lotus 1-2-3 Spreadsheet IconLotus 1-2-3 Spreadsheet
File Format Proprietary (IBM)
Usage Open manually
Rank ★ ★ ☆  Average
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.

Open With
Windows

IconIBM Lotus 1-2-3

IconCorel Quattro Pro

IconApache OpenOffice

macOS

IconPlanamesa NeoOffice

IconApache OpenOffice

Unix

IconApache OpenOffice

IconGnumeric

Updated 2007
File Type 2 Generic IconPCB123 Circuit Board Design
File Format Proprietary (Sunstone Circuits)
Usage Open manually
Rank ★ ★ ☆  Average
Description

Printed circuit board designs created with PCB123 are saved with a ".123" extension. They each contain the layout of a circuit board and may include several types of electrical components.

Info About Sunstone Circuits PCB123

PCB123 is a free printed circuit board (PCB) design program developed by Sunstone Circuits. It is used for creating 2-6 layer circuit board designs and prototypes. The program includes a CAD interface for creating and editing PCB layouts and schematics. Completed designs can be submitted to Sunstone Circuits for manufacturing.

Open With
Windows

IconSunstone Circuits PCB123

Updated November 9, 2009
space