How do I learn to code in HTML and CSS on my Mac? Web design is one of the most useful skills you can learn, and it’s easy to learn HTML and CSS (the two main pillars of web pages) in Mac OS X.

Using the #AmazonCart hashtag, you can instantly add items you spot on the 140-character social network to your Amazon cart, without ever leaving Twitter.

You can use WhatsApp's Cart feature to add items from a business' virtual catalog of items and order from a business directly via a WhatsApp chat.