single-channel simplex
51Placebo — For other uses, see Placebo (disambiguation) and Placebo effect (disambiguation). Sugar pill redirects here. For Kids of 88 album, see Sugarpills. The placebo effect can be produced by inert tablets, by sham surgery, and by false information,… …
526-meter band — The 6 meter band is a portion of the VHF radio spectrum allocated to amateur radio use. Although located in the lower portion of the VHF band, it nonetheless occasionally displays propagation mechanisms characteristic of the HF bands. This… …
53List of birds of Colombia — This is a list of the bird species recorded in Colombia. The avifauna of Colombia includes a total of 1895 species, of which 74 are endemic, 2 have been introduced by humans, and 87 are rare or accidental. 1 species listed is extirpated in… …
54List of birds of Guyana — This is a list of the bird species recorded in Guyana. The avifauna of Guyana includes a total of 796 species, of which 1 is endemic and 94 are rare or accidental. 3 species listed are extirpated in Guyana and are not included in the species… …
55List of birds of Suriname — This is a list of the bird species recorded in Suriname. The avifauna of Suriname includes a total of 720 species, of which 1 is endemic, 1 has been introduced by humans, and 5 are rare or accidental. 1 species listed is extirpated in Suriname… …
56List of birds of French Guiana — This is a list of the bird species recorded in French Guiana. The avifauna of French Guiana includes a total of 750 species, of which 4 are endemic, 2 have been introduced by humans, and 156 are rare or accidental.This list s taxonomic treatment… …
57Ulcer — An area of tissue erosion, for example, of the skin or lining of the gastrointestinal (GI) tract. Due to the erosion, an ulcer is concave. It is always depressed below the level of the surrounding tissue. Ulcers can have diverse causes. Ulcers on …
58Myriostoma — Scientific classification Kingdom: Fungi Phylum …
594 (number) — Four redirects here. For other uses, see 4 (disambiguation). 4 −1 0 1 2 3 4 5 6 7 8 9 → List of numbers Integers …
60AT&T Computer Systems — is the generic name for American Telephone Telegraph s unsuccessful attempt to compete in the computer business. In return for divesting the local Bell Operating Companies (Baby Bells), AT T was allowed to have an unregulated division to sell… …
