This tutorial is how to activate web notifications and send messages to those devices. This is best used in a school network or a public place with computers to access the internet.
For this tutorial to work it only require that firefox or chrome been installed in the machine.
 Visit www.onesignal.com and register
 Create a segment
 Save as index.html
 Create a subdomain or register a domain
 Upload to a webhosting account that you own
 After uploading the file you should have an address like
 Visit and accept notification on each computer you want to enable notifications
 Open www.onesignal.com and send a text message
All computers / smartphones connected using web notifications should show your message.
(You don't need to test the notifications as they will work)
From now on, signup on onesignal using your mobile or computer and send messages. Messages include title, message body and hyperlink.
If you want to receive cool stuff just subscribe to my notifications