1. Process management
2. Memory management
3. Disk and file systems
4. Networking
5. Security
6. Internal security
7. External security
Answer:
A line holding HTML version information, a declarative header section (separated by the HEAD element), and a body containing the document's actual content make up an HTML 4 page.
You use the Alignment sheet in the format cells dialog box to position data in a cell by centering it, for example. Generally along the middle branch is a line or centerline of the definite pipeline on a scale of whatever is indicated.
You can try downloading some kind of computer cleaner like CleanMyMac X free version, also definitely restart your computer if you haven't done so already.
The doc is blank but thanks for the points!!