The book and computer.
With the rise and spread of internet,people scan or search for information by use of computer more often than look them up in a book.The high use frequencies of computer seems to take the place of books.But in my eyes,computer and books each have its strongpoints,they two can work together.
The computer and internet is so fast and convinent when you are in need of information.You could search nearly everything on the internet.But you could not believe everthing you read or see on it,some information has nothing to do with the fact.
The books are more trusted by people,and the information in it is more detailed and exact.But it will take you a long time to look for the book you want.
So,both books and computer are good choices for being aware of knowledge and information.