Weighing in at more than a ton and storing 5MB of data, the IBM 305 RAMAC was the first super computer with a hard disk drive (HDD).
Introduced by IBM on September 13, 1956, RAMAC stood for “Random Access Method of Accounting and Control” and used a moving head hard disk drive (magnetic disk storage) for secondary storage.
So large that it had to be moved by forklift and transported by plane, the original 305 RAMAC computer system could be housed in a room of about 9 meters by 15 meters. The 350 disk storage unit, itself, measured around 1.5 square meters.
The machine stored 5 million 8-bit (7 data bits plus 1 parity bit) characters, the equivalent of 64,000 punch cards, on 50 24-inch magnetic disks.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.
