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George Davidsohn & Son, Inc. is a financial software firm, founded by George Davidsohn, now known as Davidsohn Global Technologies. It has been providing trade management systems, clearing and settlement systems, and credit and risk systems to Wall Street since 1956.

George Davidsohn
George Davidsohn started his career on Wall Street, at the age of 14, as an IBM punch-card clerk, while attending high school at night. At 18, Davidsohn was hired at Dean Witter where he helped create the first automated margin area, as well as creating and installing its first-generation computer system. He worked at Dean Witter until 1956, when he founded Davidsohn Computer Services.

Davidsohn Computer Services
The first company to do business with the fledgling firm was Spear, Leeds and Kellogg; after their trades went from an average of 2,500 to 300,000 per day, many other firms followed suit and established a relationship with Davidsohn Computer Services, making it the fastest growing supplier of technology services to the financial industry. In 1959, George Davidsohn created the first computerized margining system, and a year later, the company created the first Segregation Compliance, Stock Record, and Statement Information Systems. In 1963, the first automated trading system was also created by Davidsohn Computer Services, cementing its place in software innovation. The company was sold to Control Data Corporation in 1969. Following its sale, Control Data changed the name from Davidsohn to BTSI, which was later sold to Automated Data Processing (ADP). Though the software was no longer carrying the Davidsohn name, 98% of Wall Street was operating on Davidsohn-created technology at this time.

The Davidsohn Group
While working at Control Data, Davidsohn founded George Davidsohn & Son, Inc. and continued inventing new computer systems. In 1973, Davidsohn himself left Control Data and formed "The Davidsohn Group", a subsidiary of George Davidsohn & Son, Inc. The "Enterprise System", the third generation complete Back Office System, including Clearing, Settlement, and Books & Records functionalities was developed in 1978 and was implemented in Wagner Scott Clearing Corp., Morgan Stanley and Smith Barney.

The '80s ushered in the use of personal computers, and with that, the threat of viruses and hackers. In 1983, Davidsohn created VACCINE, the first known and commercially available computer virus software to combat this problem. Another major software development was made when the first real-time DTC Clearing System was created; this system was named PowerCage and was installed at Nomura Securities, making The Davidsohn Group's operating systems international, in 1994. Davidsohn made an impact on the global financial market again, in 1999, when ODYSSEY, the first entirely portable trading platform was released.

Davidsohn Global Technologies
After over half a century on Wall Street, George Davidsohn retired in 2007, and Joseph Davidsohn, his son, took over as President and CEO of The Davidsohn Group. Two years later, he made the decision to change the name of the company to Davidsohn Global Technologies, Inc., to emphasize their commitment in providing the financial industry with global operational functionalities. Currently, DGT is focused on its Software-On-Demand, which allows easy access to financial applications and systems by requiring little to no capital investment in hardware.