dialog

n. conversation, discussion, talk

Dialog is an online information service owned by Thomson Corporation. As a provider of information (though not in form), Dialog was one of the predecessors of the World Wide Web. The earliest form of the Dialog system was completed in 1966 under the direction of Roger K. Summit. According to its literature, it was "the world's first online information retrieval system to be used globally with materially significant databases." In the 1980s, a low-priced dial-up version of a subset of Dialog was marketed to individual users as Knowledge Index. This subset included INSPEC and MathSciNet.
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A dialogue (sometimes spelled dialog) is a reciprocal conversation between two or more entities. The etymological origins of the word (in Greek διά(diá,through) + λόγος(logos,word,speech) concepts like flowing-through meaning) do not necessarily convey the way in which people have come to use the word, with some confusion between the prefix διά-(diá-,through) and the prefix δι-(di-, two) leading to the assumption that a dialogue is necessarily between only two parties.
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Noun
1. a conversation between two persons
(synonym) dialogue, duologue
(hypernym) talk, talking
2. the lines spoken by characters in drama or fiction
(synonym) dialogue
(hypernym) script, book, playscript
(hyponym) duologue
(part-meronym) actor's line, speech, words
3. a literary composition in the form of a conversation between two people; "he has read Plato's Dialogues in the original Greek"
(synonym) dialogue
(hypernym) literary composition, literary work

n. dialog, dialogue, conversation, discussion, talk, interlocution

1. A commercial bibliographic database and retrieval service from DIALOG Information Services.
2. Interactive mathematics using a graphics tablet by Illinois Inst Tech, 1966.
["DIALOG: A Conversational Programming System with a Graphical Orientation", S.H. Cameron et al, CACM 10:349-357 (1967). Sammet 1969, p.255-258].