A  password is a secret  word or string of  characters that is used for  authentication, to prove identity or gain access to a resource (example: an  access code is a type of password). The password should be kept  secret from those not allowed access.
The use of passwords is known to be ancient. Sentries would challenge those wishing to enter an area or approaching it to supply a password or  watchword. Sentries would only allow a person or group to pass if they knew the password. In modern times,  user names and passwords are commonly used by people during a  log in process that  controls access to protected computer  operating systems,  mobile phones,  cable TV decoders,  automated teller machines (ATMs), etc. A typical  computer user may require passwords for many purposes: logging in to computer accounts, retrieving  e-mail from servers, accessing programs, databases, networks, web sites, and even reading the morning newspaper online.
Despite the name, there is no need for passwords to be actual words; indeed passwords which are not actual words may be harder to guess, a desirable property. Some passwords are formed from multiple words and may more accurately be called a  passphrase. The term  passcode is sometimes used when the secret information is purely numeric, such as thepersonal identification number (PIN) commonly used for ATM access. Passwords are generally short enough to be easily  memorized and typed.
Well what could we say, here are some, oh well, A LOT Of commonly used Passwords for Facebook, Twitter and Emails.
Are your Passwords in the List?
