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.
(..) Actress, Downton Abbey, knows the princess. This came for you, left at reception. Courier dropped it off. Know how to plug this in? Jack, call the police. Take it! Get someone to shoot that first. What the fuck is this? 'Some more breaking news, 'and a severed finger, thought (..)2011 TvShow: Black Mirror Title: The National Anthem Season: 1 Episode 1