.SP4 File Extension Information

What program uses .SP4 file extension?

Program : 20-20 CAP Studio Worksheet File
Program Website: 20-20 CAP Studio Worksheet File
Company : 20-20 Technologies
Company Website: 20-20 Technologies

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