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Paid iPad app: https://itunes.apple.com/us/app/star-walk-hd-astronomy-guide/id363486802?mt=8&at=10l6SU
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Paid Android Phone app: https://play.google.com/store/apps/details?id=com.vitotechnology.StarWalk
Paid Android Tablet app: https://play.google.com/store/apps/details?id=com.vitotechnology.StarWalk
Free iPad app: https://itunes.apple.com/us/app/encyclop-dia-britannica/id447919187?mt=8&at=10l6SU
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Free iPad app: https://itunes.apple.com/us/app/google-earth/id293622097?mt=8&uo=4&at=10l6SU
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Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.earth
Free Mac program: http://www.google.com/earth/download/
Free Windows program: http://www.google.com/earth/download/
Google Chrome app: http://www.google.com/earth/explore/products/plugin.html
Mozilla Firefox extension: http://www.google.com/earth/explore/products/plugin.html
Apple Safari extension: http://www.google.com/earth/explore/products/plugin.html
Paid iPad app: http://itunes.apple.com/app/wolfram-physics-ii-course/id455760886?ls=1&mt=8&uo=4&at=10l6SU
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Paid iPad app: http://itunes.apple.com/app/wolfram-pre-algebra-course/id453096829?ls=1&mt=8&uo=4&at=10l6SU
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Google Chrome app: https://chrome.google.com/webstore/detail/thesauruscom-synonyms-and/clljlcapeomdokpgadmegpabakieebci
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.apps.map
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Google Chrome app: https://chrome.google.com/webstore/detail/google-maps/lneaknkopdijkpnocmklfnjbeapigfbh
Paid iPad app: http://itunes.apple.com/app/wolfram-general-chemistry/id434841846?mt=8&uo=4&at=10l6SU
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Free Android Phone app: https://play.google.com/store/apps/details?id=com.studyblue
Free iPad app: http://itunes.apple.com/ie/app/studyblue/id323887414?mt=8&uo=4&at=10l6SU
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Google Chrome app: https://chrome.google.com/webstore/detail/studyblue-inc/hiicppnmnhhkaaboclnefgkbnpkompmh
Paid iPad app: http://itunes.apple.com/us/app/britannica-kids-us-presidents/id477792298?mt=8&uo=4&at=10l6SU
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Free iPad app: https://itunes.apple.com/us/app/id1050970557?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/id1050970557?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.apps.cultural
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.google.android.apps.cultural
Website: http://dictionary.com
Google Chrome app: https://chrome.google.com/webstore/detail/dictionary-by-dictionaryc/gikhgcaliglmioibbockkmjknfnepbdh
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Free Android Phone app: https://play.google.com/store/apps/details?id=org.wikipedia
Free iPad app: https://itunes.apple.com/us/app/wikipedia-mobile/id324715238?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/wikipedia-mobile/id324715238?mt=8&uo=4&at=10l6SU
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Paid iPad app: https://itunes.apple.com/app/wolfram-us-presidents-reference/id461930662?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/app/wolfram-us-presidents-reference/id461930662?mt=8&uo=4&at=10l6SU
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Paid iPad app: http://itunes.apple.com/us/app/reading-trainer/id406388984?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/econ-ed-mobile/id501425811?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=org.stlouisfed.econedmobile
Paid iPad app: http://itunes.apple.com/app/wolfram-precalculus-course/id434839548?mt=8&uo=4&at=10l6SU
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