Just try to remember the SAP terminology of representing the business or business objects... such as
Particular | Starts with | Example |
Vendor | L | LFA1 |
Customer | K | KNA1, KONV |
Sales | V | VBAK, VBAP |
Bank | B | BKNF, BKPF |
Purchasing | E | EKKO, EKPO |
Material | M | MARA, MAKT, MARC |
Master | T | T001, T001W |
Particular | Header Table - contains | Example | Item Table - contains | Example |
Sales, Delivery, Billing, Purchasing … | K | VBAK, LIKP, VBRK, EKKO | P | VBAP, LIPS, VBRP, EKPO |
Finance Tables:
Contains | Meaning | Example |
I | Open Item | BSID |
A | Closed Item | BSAD |
Ends | Meaning | Example |
S | G/L Master Open Item | BSIS, BSAS |
D | Customer related | BSID |
K | Vendor related | BSIK |
Hope this helps all 
Regards
Rounak