The certificates allow computers to generate digital signatures that the credit card companies hope will weed out the most common types of fraud.

The commercial certificate itself does not allow a pilot to fly in instrument meteorological conditions.

A certificate allows the investor to make an investment and to earn a guaranteed interest rate for a predetermined amount of time.

These certificates are flexible and allow add-on payments during the term or withdrawals up to a specified amount without a charge.

Most tax-deferred certificates do not allow add-on payments or partial withdrawals.

The repairman's certificate allows the holder to perform and sign off on most of the maintenance, repairs, and inspections themselves.

That certificate would allow the holder, in 30 years, to buy a share of stock for the value of the two other certificates, in this case $52.

The certificate Apple provides to developers allows software to run on up to five different handsets.

The full certificate will allow a business to receive the maximum benefits potentially available under the AEO scheme.

The certificate allows Hearst to defer taxes on the sale if it buys another qualified property within a certain period.