Here is a list of common Merchant Account definitions -

Real-Time Processing - This method of credit card charging authorizes and charges the customer's credit card at the time of purchase.

Offline Processing - This method of credit card charging allows you to capture your customers' credit card information for charging at a later time. If you have an existing offline merchant account, this may be a good option for you.

Secure Socket Layer (SSL) - SSL is a secure web protocol that uses 128 bit or higher encryption to keep your customer's card number and personal information secure.

Statement Fee - This charge is exactly as it sounds. The fee you pay for the bank to generate and mail you a statement outlining your transactions. Statement fees usually cost between $10.00-$15.00/month.

Read More >> Merchant Account Definitions

How about:
Qualified Charges - All information customer provides matches information on credit card file; Name, Address, Phone Number, Company Name, and even now CVV Number
Semi-Qualified Charges - Only a few bits match, or you only enter in a few bits; Name, Address
Non-Qualified Charges - Where you tell the credit card processor (Authorize, etc.) to only check Name
All of these carry different percentages that the processing company will charge you. Usually the difference between Qualified and Non Qualified is about 1% and 10cents. This can add up quickly. So, double check your percentages!