- Like
- Digg
- Del
- Tumblr
- VKontakte
- Flattr
- Buffer
- Love This
- Odnoklassniki
- Meneame
- Blogger
- Amazon
- Yahoo Mail
- Gmail
- AOL
- Newsvine
- HackerNews
- Evernote
- MySpace
- Mail.ru
- Viadeo
- Line
- Comments
- Yummly
- SMS
- Viber
- Telegram
- Subscribe
- Skype
- Facebook Messenger
- Kakao
- LiveJournal
- Yammer
- Edgar
- Fintel
- Mix
- Instapaper
- Copy Link
Back in the day post offices (in NYC) were connected with pneumatic tubes, Popular Science 1951 – Link.
2 thoughts on “What happens when you mail a letter”
Comments are closed.
Some of the tubes are still contiguous. Somebody was making noises about running fiber through them.
It’s an Internet of tubes, if you will.