| File Type 1 |
Lotus 1-2-3 Spreadsheet (Most common) |
| File Format |
File |
| Common? |
No |
| File 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 |
Windows: IBM Lotus 1-2-3 |
| File Type 2 |
PCB123 Circuit Board Design |
| File Format |
Proprietary File |
| Common? |
No |
| File 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 |
Windows: Sunstone Circuits PCB123 |
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