The Tandy Color Computer was introduced in 1980 and was followed by the Tandy Color Computer 2 in 1984. The original price of the Color Computer (or CoCo, as they are often called) was $300 in 1983 (Consumer Reports, p.475).
Processor: The Tandy Color Computer uses a Motorola 6809 microprocessor which is capable of addressing 64K of RAM.
RAM: The Color Computer originally came with 4K of RAM with later models featuring more memory. The memory could be upgraded to a total of 64K.
Keyboard: The Color Computer uses a simple calculator style keyboard with 53 keys (Consumer Reports, p.475). The Color Computer 2 came with a typewriter style keyboard, but has the same key layout as the original Color Computer. The keyboard has all standard ASCII key except 96 and 123 though 127 (`, {, |, }, ~, del). Other characters come from 4 arrow keys or other keys combined with the shift. There is no control key, so control characters can not be typed either.
Video: The Color Computer's video output is radio frequency, so only a TV set can be used for a display. The display supports 32 column by 16 line text, which makes applications like word processing and spreadsheets difficult.
Storage: The Color Computer has a cassette interface connector to connect with a standard portable cassette recorder. The Color Computer has an optional floppy disk controller that connects to the cartridge port on the side of the machine. The controller uses industry standard drives, so any size media can be used. The Color Computer's operating system is stored in the disk controller's ROM, and the capacity is hard coded.
Unfortunatly I've lost some interest in the Color Computer recently. While the computer has the same keyboard layout as the TRS-80 Model I, for some reason the keys aren't mapped the same. Specificly the arrow keys, on the Model I control charaters can be typed but for some reason, that's not the case with the Coco. Of course one could write their own keyboard scan code, but that's not the point. Also, the video system is quite limited, even by 1980 standards. One of the nice things about the machine is it's all-in-one design (built in power supply and serial port), as well as it's 6809 processor; one of the best 8 bit CPUs ever made. While I took an interest in the Coco because I liked the rest of the TRS-80 line, I realize now that the input (keyboard) and output (video) make or break a system. No offense to Coco fans, just my 2 cents.