Question

think different is tagline of which brand

Answer 1

thank you for asking the question !!!

some times companies use different campaigns to uniquely show their products. "Apple" done same thing by starting the campaign in 1997 and used the tagline " think different" when they introduced their computers and discontinued that tagline in 2002. They were registered as "Apple computer, inc" which is now "Apple, inc". 
"Think" was the slogan of IBM so every body thought that in response to IBM's "Think" Apples has started their campaign.