---
created_at: '2017-01-15T14:54:21.000Z'
title: "“First actual case of bug being found” (1947)"
url: https://commons.m.wikimedia.org/wiki/File:H96566k.jpg
author: saycheese
points: 44
story_text: 
comment_text: 
num_comments: 13
story_id: 
story_title: 
story_url: 
parent_id: 
created_at_i: 1484492061
_tags:
- story
- author_saycheese
- story_13404211
objectID: '13404211'

---
[Source](https://commons.m.wikimedia.org/wiki/File:H96566k.jpg "Permalink to File:H96566k.jpg - Wikimedia Commons")

# File:H96566k.jpg - Wikimedia Commons

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![File:H96566k.jpg][9]

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[H96566k.jpg][10] ‎(740 × 583 pixels, file size: 89 KB, MIME type: image/jpeg)

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| DescriptionH96566k.jpg | 

**English:** **The First "Computer Bug"** Moth found trapped between points at Relay # 70, Panel F, of the Mark II Aiken Relay Calculator while it was being tested at Harvard University, 9 September 1947. The operators affixed the moth to the computer log, with the entry: "First actual case of bug being found". (The term "debugging" already existed; thus, finding an actual bug was an amusing occurrence.) In 1988, the log, with the moth still taped by the entry, was in the Naval Surface Warfare Center Computer Museum at Dahlgren, Virginia, which erroneously dated it 9 September _1945_. The Smithsonian Institute's National Museum of American History and other sources have the correct date of 9 September _1947_ (Object ID: 1994.0191.01). The Harvard Mark II computer was not complete until the summer of 1947. **Removed caption read:** Photo # NH 96566-KB First Computer "Bug", 1945

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| Date |  9 September 1947 |  
| Source |  U.S. Naval Historical Center Online Library Photograph [NH 96566-KN][11]  
The above link is no longer valid on 13.04.2017, the image available [here][12]. |  
| Author |  Courtesy of the Naval Surface Warfare Center, Dahlgren, VA., 1988. |  
| Permission  
([Reusing this file][13]) | 

| Public domainPublic domainfalsefalse | 

| ----- |
| ![Public domain][14] |  _This file is a work of a sailor or employee of the [U.S. Navy][15], taken or made as part of that person's official duties. As a [work][16] of the [U.S. federal government][17], the image is in the [**public domain][18]** in the United States._ | 

![Seal of the United States Department of the Navy.svg][19]

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| [This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.][20] |   | |

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<http://americanhistory.si.edu/collections/search/object/nmah_334663>

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## File history

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|  | Date/Time | Thumbnail | Dimensions | User | Comment |  
| current | [08:02, 21 July 2012][9] | ![Thumbnail for version as of 08:02, 21 July 2012][21] | 740 × 583 (89 KB) | [Cwbm (commons)][22] ([talk][23] | [contribs][24]) | Reverted to version as of 21:04, 23 March 2007; wrong rotation |  
|  | [05:34, 20 July 2012][25] | ![Thumbnail for version as of 05:34, 20 July 2012][26] | 576 × 740 (89 KB) | [Rotatebot][27] ([talk][28] | [contribs][29]) | Bot: Image rotated by 90° |  
|  | [21:04, 23 March 2007][30] | ![Thumbnail for version as of 21:04, 23 March 2007][31] | 740 × 583 (89 KB) | [Dcoetzee][32] ([talk][33] | [contribs][34]) | Losslessly remove caption bar with JPEGCrop |  
|  | [23:02, 24 May 2005][35] | ![Thumbnail for version as of 23:02, 24 May 2005][36] | 740 × 615 (94 KB) | [Roo72][37] ([talk][38] | [contribs][39]) | Photo of first [Computer bug][40], public domain image from [http://www.history.navy.mil/photos/images/h96000/h96566kc.htm US Navy]. From the website: '''Photo #: NH 96566-KN (Color)''' '''The First "Computer Bug"''' Moth found trapped between points at  | 

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## Metadata

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| ----- |
| JPEG file comment | File written by Adobe Photoshop¨ 4.0 | 

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