(it's) all systems go

everything is ready for something to begin.

Once the new software is installed, it's all systems go.

• tire you out
• tit for tat
• tit-for-tat
• tittle-tattle
• to advantage
• to a fault
• to a fine art
• to all intents and purposes
• to a man
• to and fro
• toast of
• toast of somewhere
• to a tee
• to begin with
• to be on the safe side
• to be said for
• to be said for doing something
• to be said for something
• to be sneezed at
• to be sniffed at
• to boot
• to call own
• to call your own
• to cap it all
• to coin a phrase