3 Bugs Later Turned As Features

1. Undo mail in Gmail 
    Gmail's original bug of 5 second delay in sending mails was turned into undo mail feature.  

   When sending messages, Gmail usually has a 5 second delay.Meaning the Gmail server does not immediately process the message and transmit to the recipient.  So, if users click on the Undo button within that 5 second delay after hitting the send button,Gmail can stop processing it giving the senders enough time to make some changes to their messages.

   Turn on this feature at the Labs tab on the Settings of your Gmail account. After activating the feature, you’ll see the “Undo” button the next time you send a Gmail message.

2. Hiding files with dot in Unix Linux 

   Awesome feature of Linux and UNIX where you can hide your files simply by adding dot before the file name. Well yes, this was originally a mistake in Unix, which wasn't fixed later.

3. Busty Lara Croft 

Lara Croft avatar design in Tomb Raider was originally an error. This is the story:

“While making test adjustments to her girlish figure, a slip of mouse turned an intended 50 per cent increase to her breast size into a 150 per cent gain. It met with instant approval from the team before Gard (designer) could correct it.”