IBM (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "IBM" in Bulgarian language version.

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columbia.edu

da Cruz, Frank. The IBM Naval Ordnance Research Calculator // Columbia University Computing History, 18 октомври 2004. Посетен на 20 октомври 2006.

IBM Is Blowing Up Its Annual Performance Review // Fortune. February 1, 2016. Посетен на 27 май 2021.

((en)) История на IBM – десетилетие 1910
((en)) История на IBM – десетилетие 1920
704 Data Processing System // IBM Archives – Exhibits – IBM Mainframes – Mainframes reference room – Mainframes product profiles. IBM. Посетен на 18 август 2016.
IBM archives NORC Reference room // Посетен на 4 септември 2017. (на английски)

IBM Total Assets 2006-2021 | IBM | MacroTrends // www.macrotrends.net. Посетен на 18 юни 2021.
IBM Total Assets 2006-2021 | IBM | MacroTrends // www.macrotrends.net. Посетен на 18 юни 2021.