Editing Dan Ingalls (section)

{{Short description|American computer scientist}}
{{Infobox scientist
| name = Dan Ingalls
| image = Dan Ingalls.jpg
| birth_name = Daniel Henry Holmes Ingalls Jr.
| birth_date = {{Birth year and age|1944}}
| birth_place = [[Washington, D.C.]]<ref>{{Cite web |url=https://books.google.com/books?id=29RIAAAAYAAJ&q=%22Ingalls+Daniel%22+%221944+Washington%22 |title=Standard and Poor's Register of Corporations, Directors and Executives |volume=2 |date=1997 |page=548}}</ref>
| death_date = <!--{{death date and age |20yy|mm|dd |1944|mm|dd}} (death date then birth date)-->
| death_place = 
| residence = 
| citizenship = [[United States]]
| field = [[Computer science]]
| workplaces = [[PARC (company)|Xerox PARC]]<br />[[Apple Inc.]] [[Apple Advanced Technology Group|ATG]]<br />[[Interval Research Corporation]]<br />[[Walt Disney Imagineering]]<br />[[Hewlett-Packard]] [[HP Labs|Labs]]<br />[[Sun Microsystems]] [[Sun Microsystems Laboratories|Labs]]<br />[[SAP SE]]
| education = [[Harvard University]] ([[Bachelor of Arts|B.A.]])<br />[[Stanford University]] ([[Master of Science|M.S.]])
| doctoral_advisor = 
| known_for = [[Bit blit]]<br />[[Context menu|Pop-up menus]]<br />[[Smalltalk]]<br />[[object-oriented programming]]<br />[[Fabrik (software)|Fabrik]] [[visual programming language]]<br />[[Lively Kernel]]
| prizes = [[Association for Computing Machinery|ACM]] [[Grace Murray Hopper Award]] (1984)<br />[[ACM Software Systems Award]] (1987)
Dr. Dobbs Excellence in Programming Award (2002)
Computer History Museum Fellow (2022)<ref>{{cite web | url=https://computerhistory.org/profile/dan-ingalls-2/ | title=Dan Ingalls }}</ref>
Dahl-Nygaard Prize for Senior Researcher (2022)<ref name="auto1">{{cite web | url=https://2022.ecoop.org/details/ecoop-2022-keynotes/5/Dahl-Nygaard-Senior-Prize-Dan-Ingalls-A-Fireside-Chat | title=Dahl-Nygaard Senior Prize: Dan Ingalls - A Fireside Chat (ECOOP 2022 - Keynotes) - ECOOP 2022 }}</ref>

| footnotes = 
}}
'''Daniel Henry Holmes Ingalls Jr.''' (born 1944) is a pioneer of [[Object-oriented programming|object-oriented]] [[computer programming]] and the principal [[Systems architect|architect]], designer and implementer of five generations of [[Smalltalk]] environments. He designed the [[bytecode]]d [[virtual machine]] that made Smalltalk practical in 1976. He also invented [[bit blit]], the general-purpose graphical operation that underlies most [[bitmap]] [[computer graphics]] systems today, and [[Context menu|pop-up menus]]. He designed the generalizations of BitBlt to arbitrary color depth, with built-in [[Scaling (geometry)|scaling]], [[rotation]], and [[Spatial anti-aliasing|anti-aliasing]]. He made major contributions to the [[Squeak]] version of Smalltalk, including the original concept of a Smalltalk [[Self-hosting (compilers)|written in itself]] and made [[Porting|portable]] and efficient by a Smalltalk-to-[[C (programming language)|C]] [[Source-to-source compiler|translator]].