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Their efforts to improve the design resulted in October 1939 with the SP-200 series, an 18-tube, single conversion superhet receiver. [ 1 ] [ 2 ] The SP-200 series Super-Pro receivers were manufactured through 1945, with thousands delivered to the military during World War II ; they saw wide use by the U.S. Signal Corps as the BC-779 and the BC ...
634–635: not in use; available for geographic assignment 636: Missouri (St. Charles, Chesterfield, Union, Troy, and parts of east-central Missouri) May 22, 1999: split of 314; 637–638: not in use; available for geographic assignment 639: Saskatchewan: May 25, 2013
101 to 200 (24 November 1953 – 15 March 1965) 201 to 300 (19 March 1965 – 12 October 1971) 301 to 400 (20 October 1971 – 7 December 1976) 401 to 500 (14 December 1976 – 28 January 1982) 501 to 600 (25 February 1982 – 19 October 1987) 601 to 700 (30 October 1987 – 17 June 1991) 701 to 800 (31 July 1991 – 8 January 1993)
← 0 100 200 300 400 500 600 700 800 900 ... Mertens function(635) = 0, number of compositions of 13 into pairwise relatively prime parts [32] "Project 635", ...
The body parts, which appeared to be from chickens and alligators, shut down three lanes of southbound traffic on the busy freeway. Animal body parts strewn across I-635 in Balch Springs after ...
Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, or 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.
ARINC 635 defines the protocols for the HFDL network of radios used for communication and messaging between aircraft and HF Ground Stations. ARINC 653 is a standard Real Time Operating System (RTOS) interface for partitioning of computer resources in the time and space domains. The standard also specifies Application Program Interfaces (APIs ...
The Dominican Republic is assigned specific 1‑800 exchanges in the North American Numbering Plan; the 1-809-200-xxxx exchange is also free for domestic callers in that country. In Egypt, it starts with "0800" followed by a seven-digit number. Unavailable via cellphones. In Ecuador, it starts with "1800" followed by a 6-digit number. Some ...