In 2011 a new, improved version of the Wayback Machine, with an updated interface and fresher index of archived content, was made available for public testing.
In 2011 a new , improved version of the Wayback Machine , with an updated interface and fresher index of archived content , was made available for public testing .
When was an upgrade of the Wayback Machine released for testing?
When was an upgrade of the Wayback Machine released for testing ?
2011
2011