Tekla Milestones 

1966        Teknillinen laskenta Oy is established in Helsinki. Tekla is adopted as new trade name. Reino Heinonen is appointed as the company's Managing Director.
1968 Focus of software development shifts to structural engineering, road building and earth-moving.
1970 Tekla opens a remote connection to Nokia's computing center.
1972 Tekla opens a fixed remote line to the Control Data Corporation computing center in Stockholm and obtains its first Scandinavian customers.
1973 Tekla begins FEM (Finite Element Method) computation and gains customers in the mechanical engineering industry.
1976 Plotter software and graphic printing are adopted.
1979 Tekla acquires its first main computer (Perkin Elmer).
1980 The company adopts Tekla Oy as its legal name.
1981 All designers and programmers get an alphanumeric terminal of their own.
1986 Tekla develops virtual database technology: the use of relational databases becomes notably faster.
1987 Tekla's first successful systems that combine graphics and a relational database are completed.
1988 Tekla begins developing its own technical tools, "kits", for software development.
1989 All of Tekla's new software development projects are moved to the Unix environment using the company's own technical tool (GISbase). 
1990 Tekla's first X product, Xroad for road planning, is launched, followed by Xcity for urban planning.
1991 The Xpower network information system for electricity utilities is followed by a similar system for telephone companies: Xcable.
1993 The commercial version of the structural steel engineering software Xsteel is completed.
1995 Tekla's quality system is certified.
1996 A subsidiary is established in Sweden. Tekla's transfer to the Windows environment begins with the Xforest software product.
1997    Tekla completes its first Internet technology application: WebMap for municipalities.
1998 Tekla's long-term Managing Director Reino Heinonen is followed by Seppo Ruotsalainen. Tekla establishes a subsidiary in Malaysia.
1999 Tekla establishes subsidiaries in the United States, the United Kingdom, Germany and Japan.
2000 Tekla is listed on the Helsinki Stock Exchange. The company buys the French company SMRT, which becomes Tekla's subsidiary Tekla Sarl. Tekla also starts subsidiaries in Norway, the United Arab Emirates and Brazil, and a representative office in China.
2001 Tekla divests its Xcable, Xenvi and Xforest operations and buys customer information system business and related services from Finnish Enfo Plc.
2002 Seppo Ruotsalainen resigns in November, and Heikki Multamäki is appointed as the company's acting President and CEO. Tekla introduces extranet and intranet network services developed for energy companies.
2003 Microsoft .NET software development environment is adopted.
2004 Ari Kohonen starts as President and CEO. The business acquired from Enfo is sold to TietoEnator. Tekla Structures structural engineering software (based on Xsteel) is launched.
2006 Tekla's 40th anniversary. Tekla establishes a liaison office in India.
2007 Tekla sells its project-based Defence business to Patria. Tekla establishes an office in Denmark.
2008 More than 80% of net sales comes from international operations. Tekla has an own office in 12 countries and a worldwide partner network. Tekla's software products and services are used in more than 80 countries.
2009 In February Tekla Malaysia opens a representative office in Jakarta, Indonesia and another in July in Bangkok, Thailand. More than 16,000 Tekla Structures licenses are sold globally.
2010 More than 18,000 Tekla Structures licenses are sold globally. Tekla has customers in nearly 100 countries. In February Tekla receives the 2009 Internationalization award from the President of the republic of Finland. In the same month, Tekla establishes an office in Singapore to serve as the Tekla hub for South East Asia.