This is really a tckiry question, very useful to solicit discussions but it is also a wrong question. From an IT perspective managed services are any kind of service that is provided by a third party to which IT transfer the ownership of service cost and risk after having negotiated a service level (SLA) and a price. Cloud Computing is a specific consumption and delivery model for IT services. From an enterprise IT perspective Cloud Computing can become a type of managed services when an external provider is involved. Different conditions can occur, the external provider can for example:- manage a client-owned on premise private cloud- host and manage a client-owned private cloud- manage public cloud services for multiple clients