On Sunday, October 25, the website will be unavailable from 18:30 to 23:59 due to major maintenance (this is unrelated to the PHP security vulnerability)
Punching refers to making holes in paper. We use special machines for this. Two or four holes can be punched so that the paper can be neatly stored in a folder. Or a larger number of smaller holes can be punched so that the pages can be bound together using the Wire-O binding method.