under the windows operating system, the executable program extension can be:. exe,. sys,. com and other types of files.
1、? Exe
the full name of exefile in English is executable file, which is translated into executable file. It is a portable file with executable (PE) file format. It can be loaded into memory and executed by the operating system loader, and it is an executable program that can be positioned in the storage space of the operating system.
notepad.exe, a notepad program, can be used to edit documents, such as: test. txt, and double-click to open notepad.exe Notepad program for editing.
2、? . sys
sys is the abbreviation of system, which means system, and sys is the system file of Windows. Such as installation files, log files, driver files, backup files, operation files such as playing, and some junk files and so on. Are all suffix names of this kind of sys.
3、? . com
.com is a generic top-level domain (gTLD) on the DNS of the Internet. Its name comes from the English word "commercial", indicating the original intention of registering this domain name by a commercial organization. However, as. com,. org and. net are open to unlimited registration, there will be no difference in the end.
Extended materials:
Registration requirements
1. Only English letters (a-z, case-insensitive), numbers (-9) and "-"(hyphen in English) are provided, and spaces and special characters are not allowed. 、$、& 、? Wait).
2, "-"cannot be used as the beginning and end.
3. The length cannot exceed 63 characters.
4. Simple, easy to remember and logical (consistent with enterprise trademarks and product names; According to the nature and purpose of the website).
5. Register multiple different suffixes for the same domain name (which can be used to ensure the uniqueness of the company brand and make it easier for Internet users to find your website).
6. The purchase period of domain name should be more than 2 years (to reduce the risk of domain name loss and avoid the economic loss caused by the rising price of domain name in the future, and you can also enjoy preferential treatment if you buy it for many years). ?
Reference: Baidu Encyclopedia-.com
Reference: Baidu Encyclopedia-executable file
Reference: Baidu Encyclopedia.