persistent object systems / few systems / system unavailable to applications / satisfactory solution / software upgrades / programming model that allows applications / schema evolution systems / upgrade infrastructure / earlier systems / lazy modular upgrade infrastructure / upgrade systems / runtime infrastructure / possible solutions / /
OperatingSystem
Linux / /
Organization
Brandeis University / National Science Foundation / Department of Computer Science / MIT / /
Person
Steven Richman / Barbara Liskov / /
Position
writer / function writer / General / programmer / /