[PAYE] In the UK, every person paid under the PAYE scheme is allocated a tax code by HM Revenue and Customs. This is usually in the form of a number followed by a letter suffix, though other `non-standard` codes are also used. This code describes to employers how much tax to deduct from an employee. The code is normally based on information...
Found on
http://en.wikipedia.org/wiki/Tax_code_(PAYE)

Your tax code (also called you PAYE code) enables your allowances to be taken into account when calculating the tax to be deducted from your pay under the PAYE (Pay As You Earn) scheme. The code number is constructed by adding the allowances available and deducting benefits in kind from which tax cannot be deducted, and other untaxed income. It can...
Found on
http://www.encyclo.co.uk/local/20949

The official body of tax laws and regulations.
Found on
http://www.irs.gov/app/understandingTaxes/student/glossary.jsp

Your tax code (also called you PAYE code) enables your allowances to be taken into account when calculating the tax to be deducted from your pay under the PAYE (Pay As You Earn) scheme. The code number is constructed by adding the allowances available and deducting benefits in kind from which tax cannot be deducted, and other untaxed income. It can...
Found on
https://www.encyclo.co.uk/local/20956
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