change to a better seat or level of service Anglais:

You'll need to upgrade your hard drive to 4Mb before running this software.

Computer software must be often upgraded.

An upgrade is a change to a better seat or level of service.

to be upgraded to business class

It's very simple to upgrade the indexing software. There were no seats left in economy so we were upgraded to business class.

It's a beta version, but I found the upgrade.

Can I upgrade my laptop to Windows 10?

Electing to upgrade the computer lab, the university library went slightly over the budget.