English alphabet evolved from Anglo-Saxon futhorc runic script in 5th century. Latin script replaced futhorc around 7th century. Byrhtferð recorded traditional alphabet order in 1011. Modern English alphabet consists of 26 letters with both uppercase and lowercase forms
Pneumonoultramicroscopicsilicovolcanoconiosis is the longest word in any major dictionary (45 letters). Oxford English Dictionary contains pseudopseudohypoparathyroidism (30 letters). Merriam-Webster's Collegiate Dictionary has electroencephalographically (27 letters). Floccinaucinihilipilification is the longest non-technical word (29 letters)
"SB" means "somebody" in texting. Can mean "Snap Back" on Snapchat. Used to request replies to Snap messages. Can be used to remind someone to reply to a Snap
"TY" means "thank you" in text and social media. It can be written in all caps, lowercase, or uppercase. It's a casual abbreviation used in informal communication
WYD stands for "what you doing" or "what are you doing". Used to ask about current activities or check availability. Can be used sarcastically by annoyed or angry individuals
"Idk" is a casual abbreviation for "I don't know". It's commonly used in texting and messaging. All variations like "idk", "IDK", or "I.D.K." mean the same thing. It's informal and should not be used in professional settings