If you should ever be forced by a robber to withdraw money from an ATM machine, you can notify the police by entering your Pin # in reverse.For example if your pin number is 1234 then you would put in 4321. The ATM recognizes that your pin number is backwards from the ATM card you placed in the machine. The machine will still give you the money you requested, but unknown to the robber, the police will be immediately dispatched to help you. This information was recently broadcasted on TV and it states that it's seldom used because people don't know it exists..

Fefreshing my memory...

The Open Systems Interconnection Reference Model (OSI Reference Model or OSI Model) is an abstract description for layered communications and computer network protocol design. It was developed as part of the Open Systems Interconnection (OSI) initiative.In its most basic form, it divides network architecture into seven layers which, from top to bottom, are the Application, Presentation, Session, Transport, Network, Data-Link, and Physical Layers. It is therefore often referred to as the OSI Seven Layer Model.

A layer is a collection of conceptually similar functions that provide services to the layer above it and receives service from the layer below it. For example, a layer that provides error-free communications across a network provides the path needed by applications above it, while it calls the next lower layer to send and receive packets that make up the contents of the path.

This tool will convert Chinese characters (and just about everything else, including Japanese hiragana, katakana, and kanji; tonal Hanyu Pinyin; and Cyrillic script) into the decimal (not hex) form of Unicode numerical character references (NCRs). These NCRs can then be used in Web pages, with greater ease than the Chinese characters themselves for those whose operating systems or other software don't handle double-byte text well.

http://www.pinyin.info/tools/converter/chars2uninumbers.html

I used this website to develope mandarin website for my campany...=)..Setelah susah payah ako menkodingkan ia..huahuahua..