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UL 94, the Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliances testing, is a plastics flammability standard released by Underwriters Laboratories of the United States. [1] The standard determines the material's tendency to either extinguish or spread the flame once the specimen has been ignited.
The Underwriters Laboratories' UL 294 is a safety standard that addresses the construction, performance, and operation of access control systems intended to regulate or control entry into and exit from secured areas. These systems can also restrict access to certain devices through electrical, electronic, or mechanical means.
The UL enterprise [4] is a global private safety company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and UL Solutions. Established in 1894, the UL enterprise was founded as the Underwriters' Electrical Bureau (a bureau of the National Board of Fire Underwriters ), [ 5 ...
Which materials fall into the "FR-4" category is defined in the NEMA LI 1-1998 standard. Typical physical and electrical properties of FR-4 are as follows. The abbreviations LW (lengthwise, warp yarn direction) and CW (crosswise, fill yarn direction) refer to the conventional perpendicular fiber orientations in the XY plane of the board (in-plane).
␀␁␀␀Standard Jet DB: 0 mdb Microsoft Access Database 01 FF 02 04 03 02 ␁ÿ␂␄␃␂ 0 drw Micrografx vector graphic file 02 64 73 73 ␂dss: 0 dss Digital Speech Standard (Olympus, Grundig, & Phillips) v2 03 64 73 73 ␃dss: 0 dss Digital Speech Standard (Olympus, Grundig, & Phillips) v3 03 00 00 00 41 50 50 52 ␃␀␀␀APPR: 0 adx
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PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...
Its purpose was to serve as a standard programming language for testing and maintenance of electronic systems for military and commercial aerospace applications. The language was designed to be platform-independent. The ATLAS language is oriented toward the Unit Under Test (UUT) and is independent of the test equipment used.