1. WLLS 102 Class 13 5/7/2004 Professor C. Shilepsky Wells College

2. E-Commerce Why are we considering this in "Writing for WWW?" Go over study questions Some ways people make $$$ –Advertising placement fastclick.comfastclick.com –Affiliate programs linksynergy.comlinksynergy.com –Selling a service or product

3. Setting up a site Free hosting: geocities.com and othersgeocities.com –url is www.geocities.com/yournamewww.geocities.com/yourname –advertising Commercial hosting option: http://ipowerweb.comhttp://ipowerweb.com –url is www.youname.comwww.youname.com –cost: ~$96 per year Getting noticed –Register your site with search engines –Wait for Google to find and index it –Formerly more important: meta tags in the header

4. Setting up a shopping cart Payment example: PayPal –Accounts allow: individuals to pay for goods and services merchants to receive payment from an individual –Anyone can set up an account at www.paypal.comwww.paypal.com Shopping cart software: example example Client comfort –Which is more risky, handing your card to a waiter or ordering a book from Amazon? –Fact: people are becoming used to electronic transfers

5. Transaction Processing Credit card validation –Is the card number the right length? –Does it pass a checksum test? Double the value of every other digit starting with the next-to- rightmost digit. If any of the resulting values has more than two digits, then add the digits together to produce a single digit. Add the sum of all the digits not doubled in step 1 to the sum of all the digits from step 2. The result must be exactly divisible by 10 –Can be done on the client Debit authorization –Does the account permit the payment? –Done by the server, using other internet services

6. Delivery Mom and pop: pack it up and ship it out. High end: order is automatically forwarded to a shipment center