WHATSAPP is a messaging service, a chat program for mobile phones actually. This allows you to start conversations with other users, you can also send pictures or movies back and forth. The program has become popular because it is used as an alternative to SMS. Read More
EOM (or better yet (EOM)/<eom>) is used to indicate that the message is not larger.</eom> It is used on Twitter and in MSN and SMS messages, but it can also be used in the e-mail. If you put EOM in the subject of an e-mail message, the recipient knows that the rest of the message does not need to be read. So it is useful for small messages.
The word "sexting" originated in the time when sending SMS messages started to come up, but nowadays it is also used when people post messages on Twitter or Facebook. Sexting therefore comes from SMS, but is increasingly widely drawn. It is still about messages with evocative texts, pictures in hot poses, etc. Read More
Sms is a service to send or receive short messages (up to 140 characters) with the help of a mobile phone. Convenient to quickly pass something. Or to surprise someone with a thoughtful, funny or touching message.
A QR code is a two-dimensional barcode, developed by Denso-Wave. QR stands for quick Response, because the code is quickly decryptable. You can scan the QR code with a mobile phone or PDA. If you have internet on your mobile phone, you can easily open the link without having to tap the address. In a similar way, email addresses, SMS messages, phone numbers and texts (up to 7089 characters) can be offered. An example code is listed below, which goes to this website. 
You can create these codes Via Google Charts API. At the very bottom of this post an online way to create a QR code using Google Charts.
Twitter is a service/website that works a bit like MSN Messenger and SMS. You can say in 140 characters what you are doing at the moment, are reading, or are planning to go. So far it looks like SMS. All the people who follow you (in your friends list) see that message, and Kunen may respond to it (this is the comparison with MSN Messenger). You can enter these messages on the website, but there are also a lot of other tools that you can use to customize your status (Windows/Linux/Mac/Mobile/etc.). Read More