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The earliest examples of color codes in use are for long-distance communication by use of flags, as in semaphore communication. [1] The United Kingdom adopted a color code scheme for such communication wherein red signified danger and white signified safety, with other colors having similar assignments of meaning.
The first use of Army branch insignia was just prior to the American Civil War in 1859 for use on the black felt hat. A system of branch colors, indicated by piping on uniforms of foot soldiers and lace for mounted troops, was first authorized in the 1851 uniform regulations, with Prussian blue denoting infantry, scarlet for artillery, orange for dragoons, green for mounted rifles, and black ...
Electronic waste (or e-waste) describes discarded electrical or electronic devices. It is also commonly known as waste electrical and electronic equipment (WEEE) or end-of-life (EOL) electronics. [1] Used electronics which are destined for refurbishment, reuse, resale, salvage recycling through material recovery, or disposal are also considered ...
Microsoft Corporation is an American multinational corporation and technology company headquartered in Redmond, Washington. [2] Its best-known software products are the Windows line of operating systems, the Microsoft 365 suite of productivity applications, the Azure cloud computing platform and the Edge web browser.
"White" cast irons contain their carbon in the form of cementite, or iron carbide (Fe 3 C). [16] This hard, brittle compound dominates the mechanical properties of white cast irons, rendering them hard, but unresistant to shock.
What to look for in an ereader. Plenty of apps, including the Kindle app, will let you download and read digital books on a phone or tablet. But what makes ebook readers different is the screen ...
The Platform Update for Windows Vista and Windows Server 2008 (KB971644) was announced on September 10, 2009 [131] and released on October 27, 2009; [132] [133] The Platform Update for Windows Vista and Windows Server 2008 allows developers to target both Windows Vista and Windows 7 by backporting several significant components by consisting of:
A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula developed by his professor Franciscus Cornelius Donders.