Online Database Services:

We shall be referring to online databases. Most of the well-known indexing and abstracting services are now available both in the print form and in the machine-readable form. For example, Engineering Index is the name of the print version of internationally known abstracting service in engineering. The computerized form is known as COMPENDEX. To accelerate the use of online databases, these have been leased to a number of online vendors, like DIALOG Information Services (presently known as Knight-Ridder Information Inc. as DIALOG has been recently acquired by them). The vendors not only provide online access to several databases to users, but also undertake literature searching on behalf of users (known as delegated literature searching). Copies of source documents (full texts) are made available selectively by Knight-Ridder through their "Uncover" service.