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• CGCC: Code Golf and Coding Challenges, the name of the site
• TIO: Try it online!
• TNB: The Nineteenth Byte
• VTC/VTRO/VTD: Vote to Close, Reopen and Delete, respectively. Various different moderation votes available to users.
• ATO: Attempt it online!
• PPCG: Programming Puzzles and Code Golf, the former name of the site, still used by the older users.

• CGCC: Code Golf and Coding Challenges, the name of the site
• TIO: Try it online!
• TNB: The Nineteenth Byte
• VTC/VTRO/VTD: Vote to Close, Reopen and Delete, respectively. Various different moderation votes available to users.
• ATO: Attempt This Online!
• PPCG: Programming Puzzles and Code Golf, the former name of the site, still used by the older users.

• CGCC: Code Golf and Coding Challenges, the name of the site
• TIO: Try it online!
• TNB: The Nineteenth Byte
• VTC/VTRO/VTD: Vote to Close, Reopen and Delete, respectively. Various different moderation votes available to users.
• PPCG: Programming Puzzles and Code Golf, the former name of the site, still used by the older users.

• CGCC: Code Golf and Coding Challenges, the name of the site
• TIO: Try it online!
• TNB: The Nineteenth Byte
• VTC/VTRO/VTD: Vote to Close, Reopen and Delete, respectively. Various different moderation votes available to users.
• ATO: Attempt it online!
• PPCG: Programming Puzzles and Code Golf, the former name of the site, still used by the older users.

• Stack Exchange employees. These are the users who work at the company Stack Exchange. You'll very rarely see them around the site, and if you do, they'll likely be on Meta
• Diamond moderators. These are democratically elected users who handle the rare circumstances where standard users cannot moderate. Typically, this involves flags or stepping in during disagreements. You can see if a user is a diamond moderator as they have a ♦ next to their name at all times. Despite being moderators, they are still members of the community and should be treated as you would treat any other user.
• Everyone else. These are the 99.999% of users, and the vast majority of the users you'll interact with on the site

• At 1 reputation (so from the start), you can create posts
• At 15 reputation, you can flag posts and upvote posts
• At 20 reputation, you can talk in chat. This applies to your total reputation across the network
• At 50 reputation, you can comment
• At 125 reputation, you can downvote
• At 250 reputation, you can see and cast close votes on your own challenges
• At 500 reputation, you gain access to the First Posts and Late Answers review queues
• At 2000 reputation, your edits no longer require approval and you gain access to the Suggested Edits and Low Quality Posts review queues
• At 3000 reputation, you can vote to close any challenge and you gain access to the Close Votes and Reopen votes review queues
• At 10000 reputation, you can delete challenges, see deleted posts and view moderator tools
• At 20000 reputation, you can delete any post and edit tag wikis without needed approval

Keep in mind that Meta is not a place to post your closed challenges, and doing so will lead to the Meta post being closed as well

You can also notify one additional user in a comment by including "@username" in the comment. You can notify anyone who has commented on or edited the post this way. See How do comment @replies work? for more information

See When it is and is not acceptable to edit someone else's post for more guidelines on editing

• CGCC: Code Golf and Coding Challenges, the name of the site
• TIO: Try it online!
• TNB: The Nineteenth Byte
• VTC/VTRO/VTD: Vote to Close, Reopen and Delete, respectively. Various different moderation votes available to users
• PPCG: Programming Puzzles and Code Golf, the former name of the site, still used by the older users.

• Stack Exchange employees. These are the users who work at the company Stack Exchange. You'll very rarely see them around the site, and if you do, they'll likely be on Meta.
• Diamond moderators. These are democratically elected users who handle the rare circumstances where standard users cannot moderate. Typically, this involves flags or stepping in during disagreements. You can see if a user is a diamond moderator as they have a ♦ next to their name at all times. Despite being moderators, they are still members of the community and should be treated as you would treat any other user.
• Everyone else. These are the 99.999% of users, and the vast majority of the users you'll interact with on the site.

• At 1 reputation (so from the start), you can create posts.
• At 15 reputation, you can flag posts and upvote posts.
• At 20 reputation, you can talk in chat. This applies to your total reputation across the network.
• At 50 reputation, you can comment.
• At 125 reputation, you can downvote.
• At 250 reputation, you can see and cast close votes on your own challenges.
• At 500 reputation, you gain access to the First Posts and Late Answers review queues.
• At 2000 reputation, your edits no longer require approval and you gain access to the Suggested Edits and Low Quality Posts review queues.
• At 3000 reputation, you can vote to close any challenge and you gain access to the Close Votes and Reopen votes review queues.
• At 10000 reputation, you can delete challenges, see deleted posts and view moderator tools.
• At 20000 reputation, you can delete any post and edit tag wikis without needed approval.

Keep in mind that Meta is not a place to post your closed challenges, and doing so will lead to the Meta post being closed as well.

You can also notify one additional user in a comment by including "@username" in the comment. You can notify anyone who has commented on or edited the post this way. See How do comment @replies work? for more information.

See When it is and is not acceptable to edit someone else's post for more guidelines on editing.

• CGCC: Code Golf and Coding Challenges, the name of the site
• TIO: Try it online!
• TNB: The Nineteenth Byte
• VTC/VTRO/VTD: Vote to Close, Reopen and Delete, respectively. Various different moderation votes available to users.
• PPCG: Programming Puzzles and Code Golf, the former name of the site, still used by the older users.