Which invention or discovery is widely credited with enabling the first large-scale implementation of dynamic pricing in the retail sector?

Many retail pricing strategies we take for granted today were once groundbreaking inventions. Dynamic pricing - where prices change based on demand, timing, or customer segments - revolutionized industries from airlines to e-commerce. Test your knowledge about the origins of this innovative pricing approach that transformed retail economics and consumer behavior forever.

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SABRE (Semi-Automated Business Research Environment) airline reservation system, 1960s
IBM's electronic cash register with pricing database, 1973
Walmart's computerized inventory management system, 1983
Amazon's recommendation algorithm, 1998