Technically speaking, you can easily copy any text or image on the Web page into your word processor file, etc. as if the thing were yours.

However, they are all copyrighted works, and by law you are not allowed to use other people’s copyrighted works (“posting without permission”, for example) as you please. Please make a clear distinction between what you can do technically and what you are not allowed to do, so that you do not perform any illegal act.

However, when you do your assignment, for example, sometimes you want to use other people’s copyrighted works as a part of your own work. In that case, you are allowed to make “quotation” so long as you satisfy the following four conditions:

• What you are quoting from must be a published work (you are not allowed to make a quotation from your friend’s assignment).
• You have to use it for an appropriate purpose, such as reporting, reviewing, studying, etc. within a reasonable range.
• You have to clearly indicate which (who’s) copyrighted work you are quoting (i.e., the origin/source). When you do this, the source or origin must be indicated clearly to the extent that other people are able to uniquely identify it.
  
• Not only must the copyrighted work that includes the quotation (the work you are creating) be clearly distinguished from the copyrighted work which is being quoted (the work you are using), but there must also be principal-accessory relationship between the two. (Even if a principal symbol mark is small in size, it still is the principal symbol.)
   When you want to quote a text, usually you should distinguish that part by encircling the quoted text with quotation marks, “” etc.

Moreover, you should not, regardless of whether or not it is prohibited by law, engage in “plagiarism” in which you steal other people’s copyrighted works or ideas to publish as if they were your own work or ideas. If any part of your assignment or essay is a plagiarized work, please be aware that your credibility would become zero. As a matter of course, if “plagiarism” is found in your assignment or essay at the university, you will be severely punished.