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Octavo
offers rare books in PDF format on CD-ROM.
www.octavo.com
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OnScreen Science, Inc.
publishes particle physics simultation software.
www.onscreen-sci.com
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Optimum Resource
publishes software for children, middle schoolers, high schoolers, and teachers.
www.stickybear.com
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Orbis Software
publishes gradebook software.
www.orbissoft.com
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Orbund
publishes software for school administration.
www.orbund.com
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Organa
publishes story based CD-ROMs and DVD-ROMs for children and adults.
www.organa.com
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Oxford University Press
world's largest university press. Publishes CD-ROMs.
www.oup-usa.org
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