404
503
background
broken
browser
centre
client
code
computer
control
end
error
gone
help
http
hypertext
icon
information
internet
intranet
isolated
message
network
number
object
overloaded
problem
protocol
public
response
scale
server
service
sign
silver
site
social
status
symbol
technology
text
unavailable
unusual
web
webserver
website
window
work