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\f0\fs28 \cf0 Ledger is an accounting tool with the moxie to exist. It provides no\
bells or whistles, and returns the user to the days before user\
interfaces were even a twinkling in their father's CRT.\
\
What it does offer is a double-entry accounting ledger with all the\
flexibility and muscle of its modern day cousins, without any of the\
fat. Think of it as the Bran Muffin of accounting tools.\
\
To use it, you need to start keeping a ledger. This is the basis of\
all accounting, and if you haven't started yet, now is the time to\
learn. The little booklet that comes with your checkbook is a ledger,\
so we'll describe double-entry accounting in terms of that.\
\
A checkbook ledger records debits (subtractions, or withdrawals) and\
credits (additions, or deposits) with reference to a single account:\
the checking account. Where the money comes from, and where it goes\
to, are described in the payee field, where you write the person or\
company's name. The ultimate aim of keeping a checkbook ledger is to\
know how much money is available to spend. That's really the aim of\
all ledgers.\
\
What computers add is the ability to walk through these postings,\
and tell you things about your spending habits; to let you devise\
budgets and get control over your spending; to squirrel away money\
into virtual savings account without having to physically move money\
around; etc. As you keep your ledger, you are recording information\
about your life and habits, and sometimes that information can start\
telling you things you aren't aware of. Such is the aim of all good\
accounting tools.\
\
The next step up from a checkbook ledger, is a ledger that keeps track\
of all your accounts, not just checking. In such a ledger, you record\
not only who gets paid---in the case of a debit---but where the money\
came from. In a checkbook ledger, its assumed that all the money\
comes from your checking account. But in a general ledger, you write\
posting two-lines: the source account and target account.\
@emph\{There must always be a debit from at least one account for every\
credit made to another account\}. This is what is meant by\
``double-entry'' accounting: the ledger must always balance to zero,\
with an equal number of debits and credits.\
\
For example, let's say you have a checking account and a brokerage\
account, and you can write checks from both of them. Rather than keep\
two checkbooks, you decide to use one ledger for both. In this\
general ledger you need to record a payment to Pacific Bell for your\
monthly phone bill. The cost is $23.00, let's say, and you want to\
pay it from your checking account. In the general ledger you need to\
say where the money came from, in addition to where it's going to.\
The transaction might look like this:\
\
@smallexample\
9/29 BAL Pacific Bell $-200.00 $-200.00\
Equity:Opening Balances $200.00\
9/29 BAL Checking $100.00 $100.00\
Equity:Opening Balances $-100.00\
9/29 100 Pacific Bell $23.00 $223.00\
Checking $-23.00 $77.00\
@end smallexample\
\
The first line shows a payment to Pacific Bell for $23.00. Because\
there is no ``balance'' in a general ledger---it's always zero---we\
write in the total balance of all payments to ``Pacific Bell'', which\
now is $223.00 (previously the balance was $200.00). This is done by\
looking at the last transaction for ``Pacific Bell'' in the ledger, adding\
$23.00 to that amount, and writing the total in the balance column.\
And the money came from ``Checking''---a withdrawal of $23.00---which\
leaves the ending balance in ``Checking'' at $77.00. This is a very\
manual procedure; but that's where computers come in...\
\
The posting must balance to $0: $23 went to Pacific Bell, $23 came\
from Checking. There is nothing left over to be accounted for, since\
the money has simply moved from one account to another. This is the\
basis of double-entry accounting: that money never pops in or out of\
existence; it is always a posting from one account to another.\
\
Keeping a general ledger is the same as keeping two separate ledgers:\
One for Pacific Bell and one for Checking. In that case, each time a\
payment is written into one, you write a corresponding withdrawal into\
the other. This makes it easier to write in a ``running balance'',\
since you don't have to look back at the last time the account was\
referenced---but it also means having a lot of ledger books, if you\
deal with multiple accounts.\
\
Enter the beauty of computerized accounting. The purpose of the\
Ledger program is to make general ledger accounting simple, by keeping\
track of the balances for you. Your only job is to enter the\
postings. If a posting does not balance, Ledger displays an\
error and indicates the incorrect posting.@footnote\{In some\
special cases, it automatically balances this transaction for you.\}\
\
In summary, there are two aspects of Ledger use: updating the ledger\
data file, and using the Ledger tool to view the summarized result of\
your transactions.\
\
And just for the sake of example---as a starting point for those who\
want to dive in head-first---here are the ledger transactions from above,\
formatting as the ledger program wishes to see them:\
\
@smallexample\
2004/09/29 Pacific Bell\
Payable:Pacific Bell $-200.00\
Equity:Opening Balances\
\
2004/09/29 Checking\
Accounts:Checking $100.00\
Equity:Opening Balances\
\
2004/09/29 Pacific Bell\
Payable:Pacific Bell $23.00\
Accounts:Checking\
@end smallexample\
\
The account balances and registers in this file, if saved as\
@file\{ledger.dat\}, could be reported using:\
\
@example\
$ ledger -f ledger.dat balance\
$ ledger -f ledger.dat register checking\
$ ledger -f ledger.dat register bell\
@end example}
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