One size fits all?

'Business trend-setters' invented windows?

Pay attention, they only invented one of them:

you probably wouldn't know anything about 'fixies', be on this forum, or be able buy parts except from your lbs without business trendsetters, who came up with social networking, windows, internet card clearing or ebay.

My money is on "social networking" or "internet card clearing", as they're the only ones that have actually become business trends.