Gartner defines the IT asset disposition (ITAD) market with three service categories: core disposition services, secondary hardware services and ancillary life cycle services. Core disposition services are essential to ITAD processes and evaluated on a make-or-buy scale. Secondary hardware services involve acquiring used equipment from ITAD providers. Ancillary life cycle services, such as software harvesting and redeployment, are offered by full-service ITAD providers. ITAD is crucial for IT sustainability, mitigating Scope 3 emissions and supporting the circular economy.