Pick-style databases were a dominant technology from around 1973 until relational databases (led by Oracle) marginalized them, more or less. Pick databases are

Pick-style databases were a dominant technology from around 1973 until relational databases (led by Oracle) marginalized them, more or less. Pick databases are still widely used and I run into legacy applications all the time, especially in publishing. There's a decent Wikipedia article on the Pick operating system if you're interested.