What is a file header? Introduction to what is a file header?

1. The header contains the information needed by the application to decompress and display the content. The header in the protected file also contains the information needed to obtain the license.

2. Masthead is a photography term, which means "standard lens". The so-called standard lens refers to a fixed-focus lens with an angle of view similar to that of the human eye (monocular, non-rotating). The general focal length is about 50mm. This type of lens is small in size, has a large aperture, usually has mature technology, and has huge sales volume. For example, Canon's 50mm/F1.8 is a famous cheap lens.

3. The bid header is also a term in bidding, which means similar to "bid amount" or "bid price". In the bid evaluation method, if the lowest price is the winning principle, the bidding party shall The procurement budget amount given in the bid document (the bidder's quotation cannot exceed this amount, otherwise the bid will be regarded as invalid) is also called the header.