Memory Location definition:
A byte, word or other small unit of storage space in a computer’s main memory that is identified by its starting address (and size).

The byte is a unit of digital information in computing and telecommunications that most commonly consists of eight bits.
1byte = 8bits

The HTML DOM ( document object model ) defines a standard way for accessing and manipulating HTML documents.
The DOM presents an HTML document as a tree-structure.
The tree structure is called a node-tree.