Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
The Wayback Machine - https://web.archive.org/web/20080913123712/http://htmlhelp.com:80/reference/html40/block.html
HTML 4 Block-Level Elements
Most HTML 4 elements permitted within the BODY are classified as either block-level elements or inline elements. Block-level elements typically contain inline elements and other block-level elements. When rendered visually, block-level elements usually begin on a new line.
The following are defined as block-level elements in HTML 4:
The following elements may be used as either block-level elements or inline elements. If used as inline elements (e.g., within another inline element or a P), these elements should not contain any block-level elements.