Wikipedia's first sentence called it “professor of computer science at the weizmann institute of science in israel”. Today it says “computer scientist”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
We saved snapshots of this article over twenty years; you are reading the 2010 one. Red dashes: removed from Wikipedia since.Pale dots: rewritten; the numbered note shows what it says now.Red text: written in or rewritten since the previous snapshot.1 tap a number or a side note to jump between them
The opening as it read in 2010
David Harel (right) with Carl Hewitt at FLoC 2006 David Harel ( ; born 1950) is a professor of computer science at the Weizmann Institute of Science in Israel .1 Born in London , England , he was Dean of the Faculty of Mathematics and Computer Science at the institute for seven years. Harel is best known for his work on dynamic logic , computability and software engineering . In the 1980s he invented the graphical language of Statecharts , which has been adopted as part of the UML standard. He has also published expository accounts of computer science, such as his award winning 1987 book "Algorithmics: The Spirit of Computing" and has made appearances on Israeli radio and television. He currently works on many diverse topics, including visual languages , graph layout , systems biology and the communication of odours . Harel completed his Ph.D. at MIT between 1976 and 1978, which is exceptionally fast. He is now working on a computer model of a nematode, ' Caenorhabditis elegans ', which was the first multicellular organism to have its genome completely sequenced. The eventual completeness of such a model depends on his updated version of the test developed by Alan Turing to identify whether computers could reason well enough that a human communicating with them could not tell whether a human or a machine was at the other end of the communication. He is a fellow of the ACM and the IEEE . Economist article on Harel's nematode modeling2
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 343719100.
The opening as it stood in 2015 10 passages from the previous snapshot no longer appear
David Harel ( ; born 12 April 1950) is the William Sussman Professor of Mathematics at the Weizmann Institute of Science in Israel . Born in London , England , he was Dean of the Faculty of Mathematics and Computer Science at the institute for seven years.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 663791888.
The opening as it stood in 2020
David Harel ( ; born 12 April 1950) is a computer scientist at the Weizmann Institute of Science in Israel , and holds the William Sussman Professorial Chair of Mathematics. Born in London, England, he was Dean of the Faculty of Mathematics and Computer Science at the institute for seven years. He currently also serves as Vice-President of the Israel Academy of Sciences and Humanities .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 954135729.
The opening as it stood on October 6, 2023
David Harel ( ; born 12 April 1950) is a computer scientist, currently serving as President of the Israel Academy of Sciences and Humanities .He has been on the faculty of the Weizmann Institute of Science in Israel since 1980, and holds the William Sussman Professorial Chair of Mathematics. Born in London, England, he was Dean of the Faculty of Mathematics and Computer Science at the institute for seven years.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1167614037.
The opening as it stood in 2025
Israeli computer scientist David Harel ( Hebrew : דוד הראל ; born 12 April 1950) is a computer scientist, currently serving as President of the Israel Academy of Sciences and Humanities . He has been on the faculty of the Weizmann Institute of Science in Israel since 1980, and holds the William Sussman Professorial Chair of Mathematics. Born in London, England, he was Dean of the Faculty of Mathematics and Computer Science at the institute for seven years.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1286437655. This is our newest snapshot; the live article may have moved again since.
Today
Wikipedia's first sentence called it “professor of computer science at the weizmann institute of science in israel”. Today it says “computer scientist”. Read the current article and compare.
2010
2015
2020
Oct '23
2025
Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.
What Wikipedia says this is
Every article opens by defining its subject. This one was redefined since 2010, and today's defining sentence is their current revision.
Then
professor of computer science at the weizmann institute of science in israel
Now
computer scientist
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.
