Tech firms are the guiding stars for the Mass. economy

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They make life-saving medicines and voice recognition software. They lease cellphone towers and produce industrial sensors. Together, they have earned many of the top spots on this year’s Globe 100 list. Technology, broadly defined, has been the business bedrock of the Globe 100 for the past 25 years. Individual companies, and sometimes entire industries, have come and gone over that time. But the powerful influence of technology has always been reflected on the annual list of top public companies in Massachusetts. And it’s a big factor again in the Globe 100 of 2013. All told, technology, telecom, and biotech dominate the Globe 100, occupying 40 of the slots.

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