Index

OBJECT element, 338–339, 389–390

OL (Ordered List) element, 81–84, 340

one-level headings (H1), 45

online color charts, 137–138

opening files, in Web browsers, 46–47

Opera Web browser, 13

OPTGROUP element, 328, 340

OPTION element, 226, 328

Ordered List (OL) element, 81–84, 340

outlines, 83–84

outset borders, 270

overlapping tags, 39

OWL (Web Ontology Language), 31