All Concentrations (1-12); Breadth (1-12)

Concentrations (1-12)

The Transition from film reels to VHS's (Concentration 1)

The Transition from Vinyl to Cassette (Concentration 2)

The Transition/Evolution of Keyboards and the Computer Mouse (Concentration 3)

The Transition from Home Phones to Cell Phones (Concentration 4)

The Transition from DVD's to Blu-Ray's (Concentration 5)

The Transition from Quartz Clocks to Digital Clocks (Concentration 6)

The Transition from Frosted Tungsten Lightbulbs to Compact Florescent Bulbs (Concentration 7)

The Transition/Evolution of Video Game Consoles (NES - PS2) (Concentration 8)

The Transition of Floppy Disks to Hard Drives (Concentration 9)

The Transition from 35mm Film Cameras to Digital Cameras (Concentration 10)

The Transition from CD's to iPod's/MP3/Digital Media (Concentration 11)

The Transition from Typewriters to Computers (Digital Era) (Concentration 12)

Breadth (1-12) (Official)