Check out this great site on Selling a product or service before computer technology entered the picture was very difficult. Not only did you have to smile a lot, your feet had to be in good condition for pounding the pavement. That was what you did; you walked from door-to-door or office-to-office to make a sale. When you got back to your office, you followed up all of that walking with a sales letter as a last ditch effort to make that sale. If you were lucky the letter was convincing and you made a sale. Those were the good old days of sales. Now you can send your sales letter as a bulk email and hope the recipient receives it and it does not end up in the spam bin.