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NEMA Ratings Industrial Displays
Source:Rugged PC Review
NEMA ratings are standards that are useful in defining the types of environments in which an electrical enclosure can be used. The NEMA rating system is defined by the National Electrical Manufacturer Association, and frequently signifies a fixed enclosure's ability to withstand certain environmental conditions. Please refer to the table below for specific NEMA type designations. NEMA ratings are rarely applied to mobile devices, and are mainly applied to fixed enclosures. There is a correlation between NEMA ratings and IP ratings. However, this correlation is limited to dust and water. Please note that while it is possible to compare NEMA ratings and IP ratings, any such comparison is only related to the protection provided against dust and moisture. A few manufacturers of mobile computers will include NEMA ratings in their specifications, and it is important to understand how the NEMA specification correlates to a product's IP Rating.

See also:

IP ratings

NTSC(National Television System Committee) Industrial Displays
Source:Wikipedia
NTSC, named for the National Television System Committee, is the analog television system used in most of North America, most countries in South America, Burma, South Korea, Taiwan, Japan, Philippines, and so on. NTSC color encoding is used with the system M television signal, which consists of 29.97 interlaced frames of video per second.

See also:

Digital Signage

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