G/L Account Master Data 
Definition
G/L account master records contain the data that is always needed by the General Ledger to determine the account's function. The G/L account master records control the posting of accounting transactions to G/L accounts and the processing of the posting data.
Use
Before you can make postings to a G/L account, you have to create a master record in the system for the account.
Structure
G/L account master records are divided into two areas so that company codes with the same chart of accounts can use the same G/L accounts.
Chart of accounts area
The chart of accounts area contains the data that is valid for all company codes, such as the account number.
Company code specific area
The company code specific area contains data that may vary from one company code to another, such as the currency in which the account may be posted.
Integration
In the standard system, all business transactions which are posted to G/L accounts are updated in the general ledger. Additionally, you can define further ledgers to which data can also be posted. For this, you need to implement either new General Ledger Accounting or Special Purpose Ledger .