.3X5 File Extension Information

What program uses .3X5 file extension?

Program : 3x5 Knowledge Base
Program Website: 3x5 Knowledge Base
Company : Vega-Tek
Company Website: Vega-Tek

Extensions starting with

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | #-0-9