American inventions in all BBC programmes
Invented for the printing industry, air conditioning now influences where and how we live.
'Lighter than air, stronger than whiskey' - barbed wire wreaked huge changes in America.
How vast mega-stores emerged with the help of a design originally drawn in the sand.
Installing Windows might take 5,000 years without the compiler.
'Superstar' economics - how the gramophone transformed the performing industry.
From the early typewriters, the QWERTY keyboard layout has stood the test of time.
The digital spreadsheet: a technology which took the world of accountancy by storm.
The TV dinner, and other inventions from the same era, made a lasting economic impression.