Το λεξιλόγιο αποτελεί παραλλαγή του λεξιλογίου «Θεματικές Επιστημονικών Πεδίων ΕΚΤ», ειδικά διαμορφωμένη για την κατηγοριοποίηση των τεκμηρίων του OpenArchives.gr
isi - Computer Science, Information Systems covers resources that focus on the acquisition, processing, storage, management, and dissemination of electronic information that can be read by humans, machines, or both. This category also includes resources for telecommunications systems and discipline-specific subjects such as medical informatics, chemical information processing systems, geographical information systems, and some library science.