How do electronic keycards for doors work?
465434
http://www.saflok.com/product_pdfs/what_are_keycards_scrn.pdf#search='electronic%20keycards'
168291
Ive just seen biometrics implemented at some colleges in security applications. The students open a sort of bank account and the make purchase on campus, but instead of using a debit card the just scan their thumb print. Pretty cool stuff. I also saw that (again I can't remember the facility or company implementing the technology) a company is injecting employees (with employee consent ofcourse) with a chip that will work like a key to allow access to certain areas of there facility. Works just like a key card, just wave your arm infront of a sensor and the door is unlocked if you possess authorization. \nhttp://wirednews.com/news/school/0,1383,53912,00.html\nhttp://www.gahooyoogle.com/search.php?st=Web&q=biometrics+implementation\nIBM is also using biometrics for security on there systems: \nhttp://www.pc.ibm.com/us/thinkpad/short_desc.html#fingerprint
179966
it is a "Home Key" for touch typists...so those who can type without looking at the keys can get there baring on the kbrd without looking at it.
863055
it all depends what type of lock it is ,   if it is a "yale" type lock cut a piece of plastic from a cola bottle so you have a curved square piece and slide it between the door and the frame pull it down till you are at the snib of the lock whilst pushing the door. this will work if done properly. good luck. this will save your credit card from being damaged.
757826
Some cases have optical sensors which sense the open door.\nThey are located on the opposite side of the doors.
698511
If I locked them, how long would it take for them to find a key?
625023
they open a door in some fashion or form to posession.
628557
Machine code. The computers internal programming recognizes a connection from a keyboard via the ps2 connection or whatever you have(usb etc..). When you press a key on the keyboard a signal corresponding to that key is then sent to the computer and then is translated and then displayed on your monitor. Much like it is displaying every single character I am typing this very moment. Your computer receives and displays these signals almost instantly. Cool eh? :)
490990
Most games use those codes as "keys" that allow you to unlock the software before you can play it, this is most common in online games, this way they can check to see if your "key" has been used. It helps prevent piracy, or something as simple as giving a friend the cd's for the game.
1094599
Christ Almighty..............this question is like code..........for petes sake use the goddamn keys. Is your key board broken or something...................
199861
It uses different types of sensors. Some lifts uses a pressure sensor mounted beneath a carpet which senses pressure thus opening the doors. Some uses a pressure sensors on the doors when it is opposed by a smalla pressure it retrets back & opens. Others use a proximity sensors which works with two sensors, one transmittor & other reciever. When the link between the sensors is broken by a person the lift doors open
440970
When the typewriter was first invented, the keys WERE in order, but the little hammers that typed the letters often got stuck. The most commonly used letters were next to each other, so the hammers often came together and caused the mechanism to stick.\nBy arranging the letters in what is known as the QWERTY style (look at the top row of letters), it slowed down the typist and let the mechanism keep up!\nNow that it's all electronic, it doesn't matter so much, except that typists are familiar with it.\nIf it really bugs you, get a Dvorak keyboard or one of the specialist ones.
134014
A cylinder lock,  home depot has one with like five cylinders that even a cia agent couldn't break into. It used to be only like 29.99 and it worked.  (and with friends like I've had if a lock worked at all it really works - just don't get your keys swiped!)
853265
Keyboard1 may be a key logger journal. A key logger records what you type on the computer. Run a full computer scan to be safe, because typically keyloggers come up as spyware.
255004
go to http://home.howstuffworks.com/doorbell2.htm plenty of information there
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On a keyboard, the letters are arranged by hand position and by\nwhich letters are often used. For calculators this doesn't matter\nsince you only type with one hand and only type brief messages.
787773
There is no ascii code for those keys.  They have keyboard scan codes that change the states of how to interpret others keys.