Amazon Advertising (formerly AMS or Amazon Marketing Services) is a service that works in a similar way to pay-per-click ads on Google.
Apache is a free and open-source cross-platform web server software.
eBay Partner Network is an online referral program where eBay pays commissions to referrers on sales generated by customers they’ve referred.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.
Unix is a family of multitasking, multiuser computer operating systems.