These transactions are recorded in the general journal first, and typically include more information than is included in the accounting ledger; the balance of each account is not included. As in the accounting ledger, however, the credits and debits listed in the general journal must total zero.
Grid Computing is a form of distributed system with non-interactive workloads. Utility Computing is a business model where computing resources are metered. Cloud Computing is a form of utility computing that allows developers to develop, deploy and run applications.
What is the difference between Cloud Computing and Software as a Service (SaaS)? Is there a difference? If you look at SaaS in Wikipedia, you will see no mention of cloud. If you look at Cloud Computing in Wikipedia, you will see that SaaS is really the so-called Application Layer (the other layers being Infrastructure and Platform). Vendors are not making this easier.