- a audio
- b article: wordpress, facebook, tumblr, medium, comment
- c code
- d diff, edit, change
- e event
- f file
- g checkin: geolocation, foursquare, gowalla
- h hyperlink: outbound shorturl, external redirects
- i identifier
- /i/t/unicorn => /tags/unicorn
- /i/m/tt0084827 => imdb.com/title/tt0084827
- /i/i/0881791326 => ISBN numbers
- /i/a/0881791326 => ASIN numbers
- /i/oc => openid connect provider
- /i/oa2 => oauth provider
- j
- k list/playlist/folder/photo album (a playlist is just a particular kind of list, etc)
- l SKIPPED for readability ambiguous lower L/1
- m message: email lists
- n note/comment/status: twitter, app.net, wordpress, facebook, tumblr, comment
- o
- p photo: flickr, facebook, Instagram
- q quote
- r review
- s slides/presentation
- t
- u url/bookmark: pinboard, delicious, instapaper
- v video: vimeo, youtube, flickr, vine, instagram
- w
- x place: foursquare, gowalla, (x marks the spot)
- y
- z product (like a zshop on amazon)
- article
- audio
- bookmark
- comment
- file
- folder
- group
- list
- note
- person
- photo
- photo album
- place
- playlist
- product
- review
- service
- status
- video
- favorite
- follow
- like
- friend
- join
- play
- post
- save
- share
- tag
- update