HTML and CSS Reference
7.2. Ordered Lists
Use an ordered list when the sequence of the list items is important. A
list of instructions is a good example, as are tables of contents and lists
of document footnotes or endnotes.
7.2.1. The <ol> Tag
The typical browser formats the contents of an ordered list just like an
unordered list, except that the items are numbered rather than bulleted.
The numbering starts at one and is incremented by one for each success-
ive ordered list element tagged with <li> . [ <li>, 7.3 ]