Note
Some of these tags will only work on certain browsers. The list is not complete, please let me know about errors and omissions.

a	anchor (link to another page or web object)	href= usemap= name= mailto: file:// ftp:// news: gopher://
abbr	abbreviation	abbr
acronym	acronym	acronym
address	address	address
applet	Run web code (usually Java)
area	define hot-spot (image maps)	shape= rect= circle= polygon= point= default=
b	bold	b
base	defines default path	target=
basefont	defines default font	size=
big	increase font size	big
blockquote	indent both sides	blockquote
body	identifies main page content	background= color= bcolor= text= link= vlink= alink=
br	start new line here
button	create a mouse clickable button on screen
caption	display a caption for a table	align={bottom}
center	centre text	center
cite	citation	citation
code	program code	code
col	used in tables for linking coloumns	&mbsp;
colgroup	used in tables to define a group of columns	width= span= width=
dd	definition (in definition list)
del	show as deleted (cross out)	del
dfn	definition	dfn
div	division (similar to a paragraph)	accepts most attributes
dl	definition list
dt	item being defined (in definition list)
em	emphasise	em
fieldset	used to group controls
font	sets the font	size= color= fontface= font-style={normal}{italic}{oblique} font-weight={normal}{bold}bolder}{lighter}{100}{200}{300}{400}{500}{600}{700}{800}{900} font-size={xx-small}{x-small}{small}{medium}{large}{x-large}{xx-large}{larger}{smaller}
form	Defines section of page that can accept data input tags	method={post}{get} action=
frame	frame	name= target={_self}{_top}{_parent}{_blank}
frameset	define layout for frames	cols= frameborder= bordercolor= noresize scrolling={yes}{no}{auto}
h1...h6	heading (1=major to 6=minor)	size= color= fontface= font-style={normal}{italic}{oblique} font-weight={normal}{bold}bolder}{lighter}{100}{200}{300}{400}{500}{600}{700}{800}{900}
head	header section of page
hr	horizontal line	size= width= noshade
html	start/end of page
i	italic	i
iframe	inline frame
img	image	src= align={left}{right}{center} alt= width= height= border= hspace= vspace=
input	area for user to enter information	type={button}{text}{submit}{checkbox}{radio}{image} src= onClick name= size= submit reset value= maxlength= checked
ins	inserted text	ins
isindex	line for user to enter search data
kbd	keyboard	kbd
label	label for a control
legend	Name part of a form
li	list item	one two
link	link to another web resource
map	client side image map	name=
marquee	scrolling text	behaviour={scroll}{slide}{alternate} direction={left}{right} scrollamout= scrolldelay=
menu	Menu (type of unordered list)
meta	meta data	name= content=
noframes	action to take if frames not available
noscript	action to take if scripts not available
object	embed object
ol	ordered list	type={disc}{circle}{square}
option	option (in select tag)	value= selected
p	paragraph	align= {left}{centre}{right}{justify}
param	parameters (of an object)
pre	display exactly as typed	pre
q	quotation	q
s	strike-through	s
samp	sample	samp
script	script (eg. vbs or JavaScript)
select	drop down data selection (for form)	name= size= multiple
small	decrease font size	small
span	similar to paragraph but remains in same line	accepts most attributes
strong	emphasise	strong
style	style sheet	type=
sub	subscript	sub
sup	superscript	sup
table	data table	border= cols= width= align= bgcolor= background= cellspacing= cellpadding= bordercolorlight bordercolordark frame={void}{above}{below}{hsides}{vsides}{lhs}{rhs}{box}{border} rules={none}{groups}{rows}{cols}{all}
textarea	region in which user can type text	name= cols= rows=
tbody	table body
td	cell definition (inside table)	align= valign= bgcolor= background= width= height=
th	cell definition for the table header	colspan= rowspan=
tfoot	table footer row
thead	table header row
title	name for current page
tr	table row
tt	Used fixed width font	tt
u	underline	u
ul	unordered list	one two
var	show as a variable	var