.123 File Extension
File Type 1Lotus 1-2-3 Spreadsheet
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.
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.
File Type 2PCB123 Circuit Board Design
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.
Completed PCB123 designs can be sent to Sunstone Circuits for manufacturing. Assembly quotes are provided within the program.