Retrofitting refers to the addition of new technology or features to older systems.

Retrofitting Word Vectors to Semantic Lexicons
CCured: type-safe retrofitting of legacy code
CCured: type-safe retrofitting of legacy software
Mechanism for retrofitting an optical assembly housing
Kit using led units for retrofitting illuminated signs
Methods and apparatus for software retrofitting
Retrofitting Existing Chemical Scrubbers to Biotrickling Filters for H2S Emission Control
CloudVisor: retrofitting protection of virtual machines in multi-tenant cloud with nested virtualization
Overshadow:a virtualization-based approach to retrofitting protection in commodity operating systems
These aren't the droids you're looking for:retrofitting android to protect data from imperious applications