Those little software apps on your smartphone or tablet have developed into a very big business, particularly in Massachusetts. A new study finds that software app development employs 21,400 workers in the Bay State who earn a total of $1 billion a year. They include 6,300 software engineers writing code, and an equal number who directly support their activities. In addition, the survey calculates that app development generates an additional 8,800 spillover jobs, in companies that provide goods and services to app developers.
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