| 2007 | | Retired |
| 2005-2007 | | Member of Board of Directors of ERCIM (European Research Consortium in Informatics and Mathematics) |
| 1997- | | Pirjo Huovelin (born 1950) as female companion |
| 1995-2005 | | Research Manager at VTT (Technical Research Centre of Finland) |
| 1993-2005 | | Member of Executive Committee of ERCIM |
| 1991 | | Senior Lieutenant (Reserve of Finnish Defence Forces) |
| 1989-2007 | | Research Professor (VTT) |
| 1986-1989 | | Chairman of the Finnish Artificial Intelligence Society |
| 1984-1985 | | Visiting Professor (University of Maryland, USA) |
| 1983 | | Acting Professori (University of Helsinki) |
| 1982-1989 | | Senior Research Scientist (VTT) |
| 1979-1980 | | Visiting Scholar (University of California, Berkeley, USA) |
| 1977-1982 | | Associate Professor (Lappeenranta University of Technology) |
| 1976- | | Senior Lecturer (University of Helsinki) |
| 1976-1977 | | Assistant Professor (University of Helsinki) |
| 1975- | | Senior Lecturer (University of Joensuu) |
| 1974 | | Ph.D. in Computer Science (University of Helsinki) |
| 1970-1992 | | Married to Kaija Linnainmaa (born Tervonen, 1947-2008) |
| 1970-1976 | | Assistant (University of Helsinki) |
| 1970 | | M.Sc. in Mathematics (University of Helsinki) |
| 1970 | | B.Sc. in Mathematics (University of Helsinki) |
| 1967 | | "Small Diploma" in Architecture (Helsinki University of Technology) |
| 1964 | | High school graduation (Lyceum of Pori) |
| 1945 | | Born in Pori, Finland |
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| Publications | | About 70 scientific articles in Numerical Analysis, Digital Image Processing and Artificial Intelligence |
| Parents | | Olli F. Linnainmaa (1907-1991) and Katri Linnainmaa (born Vaimala, 1906-1981) |
| Sons | | Sami (M.Sc. (Eng.), born 1970), Olli (MBA, born 1973) and Timo (M.Sc. (Eng.), born 1976) |
| Grandchildren | | Isla (born 2011), Krista (born 2012), Aino (born 2013), Nella (born 2013), Silja (born 2014) and Elias (born 2015) |
| Hobbies | | Hiking, Cross Country and Downhill Skiing, Fine Art Painting, Traveling, Photographing, Computer Programming, Comics, Genealogy etc. | |
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