Examples of common acronyms include "LOL" for "laugh out loud", "BTW" for "by the way" and "TFW" for "that feeling when".
There are also combinations of both, like "CUL8R" for "see you later". Periods or exclamation marks may be used repeatedly for emphasis, such as "........" or "!!!!!!!!!! Question marks and exclamation marks are often used together in strings such as "?!?!?!?! Grammatical punctuation rules are also relaxed on the Internet.
One well-known example is "hahaha" to indicate laughter. For instance, in Spanish, laughter is spelled as "jajaja" instead because J is pronounced like H in Spanish. They are culture-specific and certain emoticons are only found in some languages but not in others.
For example, the Japanese equivalent of emoticons, kaomoji (literally "face marks"), focus on the eyes instead of the mouth as in Western emoticons. Unusual syntactic structures such as "I Can Has Cheezburger?
Bold, underline and italics are also used to indicate stress.