Question: Which company did both computer scientist Gerrit Blaauw and computer architect Gene Amdahl work for?

Context paragraphs:
Amdahl Corporation: Amdahl Corporation was an information technology company which specialized in IBM mainframe-compatible computer products, some of which were regarded as supercomputers competing with those from Cray Research.  Founded in 1970 by Gene Amdahl, a former IBM computer engineer best known as chief architect of System/360, it has been a wholly owned subsidiary of Fujitsu since 1997.  The company is located in Sunnyvale, California.

Gene Amdahl: Gene Myron Amdahl (November 16, 1922 – November 10, 2015) was an American computer architect and high-tech entrepreneur, chiefly known for his work on mainframe computers at IBM and later his own companies, especially Amdahl Corporation.  He formulated Amdahl's law, which states a fundamental limitation of parallel computing.

Fred Brooks: Frederick Phillips "Fred" Brooks Jr. (born April 19, 1931) is an American computer architect, software engineer, and computer scientist, best known for managing the development of IBM's System/360 family of computers and the OS/360 software support package, then later writing candidly about the process in his seminal book "The Mythical Man-Month".  Brooks has received many awards, including the National Medal of Technology in 1985 and the Turing Award in 1999.

Linear probing: Linear probing is a scheme in computer programming for resolving collisions in hash tables, data structures for maintaining a collection of key–value pairs and looking up the value associated with a given key.  It was invented in 1954 by Gene Amdahl, Elaine M. McGraw, and Arthur Samuel and first analyzed in 1963 by Donald Knuth.

Gerrit Blaauw: Gerrit Anne (Gerry) Blaauw (born July 17, 1924) is a Dutch computer scientist, known as one of the principal designers of the IBM System/360 line of computers, together with Fred Brooks, Gene Amdahl, and others.

Trilogy Systems: Trilogy Systems Corporation was a computer systems company started in 1980.  Originally called ACSYS, the company was founded by Gene Amdahl, his son Carl Amdahl and Clifford Madden.  Flush with the success of his previous company, Amdahl Corporation, Gene Amdahl was able to raise $230 million for his new venture.  Trilogy was the most well funded start-up company up till that point in Silicon Valley history.  It had corporate support from Groupe Bull, Digital Equipment Corporation, Unisys, Sperry Rand and others.  The plan was to use extremely advanced semiconductor manufacturing techniques to build an IBM compatible mainframe computer that was both cheaper and more powerful than existing systems from IBM and Amdahl Corporation.

Amdahl's law: In computer architecture, Amdahl's law (or Amdahl's argument) is a formula which gives the theoretical speedup in latency of the execution of a task at fixed workload that can be expected of a system whose resources are improved.  It is named after computer scientist Gene Amdahl, and was presented at the AFIPS Spring Joint Computer Conference in 1967.

Gustafson's law: In computer architecture, Gustafson's Law (or Gustafson–Barsis's Law) gives the theoretical speedup in latency of the execution of a task "at fixed execution time" that can be expected of a system whose resources are improved.  It is named after computer scientist John L. Gustafson and his colleague Edwin H. Barsis, and was presented in the article "Reevaluating Amdahl's Law" in 1988.

Elaine M. McGraw: Elaine M. McGraw (née Boehme) was an American computer programmer who, together with Arthur Samuel and Gene Amdahl, invented open addressing based hash tables in 1954.

Bram Jan Loopstra: Bram Jan Loopstra (1925 – 1979) was a Dutch computing pioneer who worked at the Mathematisch Centrum, Amsterdam and then at Electrologica with Adriaan van Wijngaarden, Carel S. Scholten and Gerrit Blaauw.  From 1956 until at least 1963 he was technical director of Electrologica.  At his death after a long illness on March 22, 1979, he was adjunct director of the Philips International Institute.

Supporting paragraphs: Gerrit Blaauw Gene Amdahl
Answer: IBM