Signa GE 1

Hardware Platform:

(from most basic to most advanced)

Horizon (plasma screen)
Advantage 3X, 4X or 5X (touch screen)
LX (mouse driven)
Excite (mouse driven, faster RF pulses)

Software Platform:

For Horizon it ends at 3.0
For Advantage spans from 3.0 to 5.8
For LX spans from 8.3 to 9.0; with an octane 2 computer, you can have 9.1
Excite is 10.0 and above

Gradient Platform:

(from most basic to most advanced)

Smart Speed

High Speed

Echo Speed

Echo Speed Plus