’

“”

’

’

Links to a site

’

Directory’s searchable

index

Internet

Directory’s Server

VISITS

PRODUCES

SEARCHES

RECEIVES

Directory Employee

EVALUATES

ADDS and “CATALOGS”

Directory’s browsable categories

BROWSES

How does a directory work?

User

Search engine’s database

index

Spider or Robot

Every word on the page

or some words on the

page

Finds new pages or changed

information on a page

Internet

Search Engine’s Server

LAUNCHES

VISITS

CRAWLS

LOCATES

RETURNS

PRODUCES

SEARCHES

RECEIVES

How does a search engine work?

User