The company has 'plugged into' the international market. [=the company has become connected to the international market; the company has begun to do business in the international market]
His friends are 'plugged into' the city's music scene. [=his friends are actively involved in the city's music scene]
The computer program will take data from these sources and automatically 'plug' it 'into' the equation.
(..) So, what do you got on the books? I'm busy. No, no, I can see how busy you are. So I'll try to be as quick as possible here. The university is pulling the plug on your brother's lab. Pulling the plug? Yeah, it's gonna finally give us all the storage space we need. Let's get something straight here, (..)2008 Journey to the Center of the Earth