The Green760 and Green790 were not sold as generic laptops that anyone could buy. They were exclusive to Micron and NEC, who sold them as the TransPort Trek 2 and Ready 440T respectively.
The G760 and G790 names come only from markings on the motherboards from these laptops. They went under numerous revisions, and I don't know which Alpha-Top internal name corresponds to which laptop revision. The earliest units used MMC1 Pentium II processors with Trident graphics, middle revisions used MMC2 Pentium IIs with ATI graphics, and the last revision supported MMC2 Pentium IIIs and used S3 graphics. For more info and specifications, see the pages on the Micron and NEC versions.
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