System (20) directed service comprising: a processor (22) operating under control of a stored program, a user interface (25) including a device (26) display and a device (27) input, both coupled to the processor (22) for interactive control thereof and, a utility (28, 30) for storing database information including a childlist library service information concerning aspects of an apparatus to which It is going to be serviced and elementosde test information concerning tests that can be performed at least one source aparato.Al support data relating to particular tests, yA computer routine executed by the processor to control the operation of device ycontrolar screen communications with the storage utility (28, 30) and at least one data source desoporte, computer routine which includes (a) a first portion toward trolar activation and communication links comunicaciónentre the processor (22) and the storage utility (28, 30) and between the processor (22) and each fuentede data support (31, 32, 33) (b) a second portion in response to user inputs via the user interface (25) enrelación to selected aspects of the apparatus to display a description of a test applicable alos selected aspects, and (c) a third position in response to the screen a description of a test for mostrarinformación on the test description shown to assist a user in test implementaciónde, characterized by at least one source chelates support data is different from the data storage utility (28.30 ) and rutinade computer further includes (d) the third portion in response to display a description of the test to automatically recuperardesde at least one data source support.
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