Transaction Code Tips

I was stumble upon nice article explaining about how the transaction code generate
Below is the summary.

1. Transaction end with number got its own meaning.

00 = MAIN MENU
01 =  ADD
02 = MODIFY
03 = DISPLAY




Fore example:

MR01 – ADD AN MM INVOICE
MR02 – MODIFY A MM INVOICE
MR03 – DISPLAY A MM INVOICE
ME00 – PURCHASING MAIN MENU
ME21 – CREATE A PURCHASE ORDER
ME22 – CHANGE A PURCHASE ORDER
ME23 – DISPLAY A PURCHASE ORDER 

2. Transaction code starting with certain letter mean is suit for different module.

Letter	Definition
F	Financial
FK	Financial Vendor Master
FS	Ledger Accounts
FB	Shared Financial Transactions (Shared between A\P A\R Assets G\L)
M	Material Management
MK	Material Vendor Master
MB	Goods Receipt -  Inventory Management
MR	MM Invoice Verification
ME	Purchasing
ME1	Purchase Requisition
ME2	Purchase Order
MM	Material Master
V	Sales & Distribution
VA	Sales Order
VF	Billing
XK	Central Vendor Master
XD	Central Customer Master
O	Usually configuration Transactions (Config transactions begin with various letters)
	Within transactions the following letters have meaning. These letters also refer to General Ledger account types and are used in naming system tables.
A	Assets (first letter fo the German word Anlagengegenstand)
D	Customer/ debit type transactions (first letter of German word Debitor)
K	Vendor/credit type of transactions (first letter of German word Kredit)
M	Material (first letter of German word Material)
S	Ledger (first letter of the German word Soll)

Example:
D, K, M, S can be view in transaction F#01 - Create Financial Custimer, Vendor or Ledger

The F at the beginning denotes a financial tranaction,
The 1 at the end denotes CREATE.
FD01 is create financial level customer accounts.
FK01 is create financial level vendor accounts
FS01 is create financial ledger accounts.

This letter can be viewed from system table creation, ecample:

BSIS – Open ledger items
BSAS – Closed ledger items
BSIK – Open vendor items
BSAK – Closed vendor items 
BSID – Open customer items
BSAD – Closed customer items




source: http://goo.gl/8bpsY