Hmph! If we're really getting into it The first system I worked on used two frequencies: 25 Hz and 28 Hz. A "1" was 60 seconds at 25 Hz and a "0" was 30 seconds at 25 Hz. Vintage Early Micro Computer 1961 Minivac 601 Extremely Rare in box - $850 (T/O) Wow, super rare and very early micro computer, the Minivac 6010, with all it's original paperwork, box, and manuals. These are nearly impossible to find in any condition and this one is excellent. Add to your vintage computer collection today. Actually looking at that Minivac 601, I would LOVE to see a sort of Korg Volca Modular in that style. In fact it looks a bit like a Volca Modular (the existing one) combined with the Korg Monotron Delay (with that round thing in the lower right looking like the radar sweep design on the monotron). Those manuals were better written than some Make sure this fits by entering your model number. 【Powerful Fade-free Suction】Powered by its industry-leading re-designed brushless 80W power motor and patented ventilation design, 70mai Vacuum Cleaner Swift features 5000Pa suction with 32000rpm high-speed efficiency to meet your daily cleaning needs. Its primary input device was an IBM electric typewriter. It was the size of a refrigerator and could easily be rolled around on wheels. The major argument against it was the price. Most of the time the G-15 sat powered off, used only by a few enthusiasts. I found someone to show me how to work it and where the manuals were stashed. The MIX was a computer design that Donald Knuth used to illustrate computer instruction sets in his magnum opus The Art of Computer Programming. MIX's model number is 1009, which was derived by combining the model numbers and names of several contemporaneous, commercial machines deemed significant by the author. The Internet Archive offers over 20,000,000 freely downloadable books and texts. There is also a collection of 2.3 million modern eBooks that may be borrowed by anyone with a free archive.org account. Minivac 601 Replica (Version 0.9) by megardi in Computers. 140 32K SKARA- Autonomous Plus Manual Swimming Pool Cleaning Robot by ryan141298 in Microcontrollers. Second Prize 74 7.7K CC/CV Power Supply by steparak in Electronics. 1 121 arts & crafts 2; baby & kid stuff 2; health and beauty 2; household items 2; barter 1; bicycles 1; computers 1; manual automatic Vintage Early Micro Computer 1961 Minivac 601 Extremely Rare in box $850 (T/O) pic hide this posting restore restore this posting ^ back to top The Minivac 601, a digital computer trainer designed by Shannon. Outside of Shannon's academic pursuits, he was interested in juggling, unicycling, and chess. He also invented many devices, including a Roman numeral computer called THROBAC, juggling machines, and a flame-throwing trumpet. He built a device that could solve the Rubik's Cube puzzle. arts & crafts 0; atvs, utvs, snowmobiles 0; aviation 0; baby & kid stuff 0; barter 0; bicycle parts 0; Vintage Early Micro Computer 1961 Minivac 601 Extremely Rare in box $850 (oxr > T/O) pic hide this posting restore restore this posting. Singer Sewing Machine Manuals $15 (oxr > E. Ventura) pic hide this posting restore restore this arts & crafts 0; atvs, utvs, snowmobiles 0; aviation 0; baby & kid stuff 0; barter 0; bicycle parts 0; Vintage Early Micro Computer 1961 Minivac 601 Extremely Rare in box $850 (oxr > T/O) pic hide this posting restore restore this posting. Singer Sewing Machine Manuals $15 (oxr > E. Ventura) pic