System is all right so long as it lessens labor. Generally system is complex and increases fixed charges.
The system of copying every letter is a waste of time. Not once in a thousand cases do you require to refer to a letter.
Have fixed rules and prices and you won't have to refer to letters.
When you do copy a letter copy it on the back of the letter you are answering. Use a carbon sheet.
Have Simplicity your rule instead of System.
System has tangled many institutions.
Beware of system that makes more work.
Don't clutter up your office with a lot of useless data and wagon loads of old letters and records.
Rule of Gold