Three rules were posted on Twitter by Soumen Bhattachaya on May 20, 2010:
   
“Mechanic’s 3 rules:
1-Always use the right tool for the job.
2-A hammer is the right tool for any job.
3-Anything can be used as a hammer.”
   
Authorship of these “three rules” (sometimes called “The three laws of American Engineering”) is unknown.
 
     
Twitter     
Soumen Bhattachaya
@soumenbhatt
Mechanic’s 3 rules:
1-Always use the right tool for the job.
2-A hammer is the right tool for any job.
3-Anything can be used as a hammer.
4:35 PM · May 20, 2010·Twitter Web Client
     
Twitter
Sam Bowne
@sambowne
1.Always use the right tool for the job. 2. A hammer is the right tool for any job. 3. Anything can be used as a hammer. http://bit.ly/IzeO7
3:41 AM · May 21, 2010·TweetDeck
 
Twitter
Nicola Gallo
@zeropuntodue
Mechanic’s three rules:1. Always use the right tool for the job.2. A hammer is the right tool for any job.3.Anything can be used as a hammer
11:25 AM · May 21, 2010·Twitter Web Client
   
Twitter
Ian
@enjoyplantpower
3 laws of U.S. Engineering: Always use the right tool for the job; A hammer is the right tool for any job; Anything can be used as a hammer.
4:38 AM · Mar 10, 2011·Twitter for iPhone
   
Twitter
Wayne Hawkey
@WayneKaPain
3 laws of American Engineering: 1 Use the right tool for the job 2 A hammer is the right tool for any job 3 Anything can be used as a hammer
7:35 AM · Mar 11, 2011·Twitter Web Client
 
Google Groups: uk.media.radio.archers
Ask EU - recovering deleted text
Ralph B
Dec 12, 2011, 10:12:50 AM
(...)
The three laws of American Engineering: 1. Always use the right tool for the job. 2. A hammer is the right tool for any job. 3. Anything can be used as a hammer.
 
Reddit—Engineering
GeneralMushroom
MEng MEP Mech Design August 17, 2015
You’re forgetting the 3 main rules of engineering:
Always use the right tool for the job
The right tool is always a hammer
Anything can be used as a hammer
     
Twitter
Bob Kostic
@causticbob
The three laws of American Engineering:
1. Always use the right tool for the job.
2. A hammer is the right tool for any job.
3. Anything can be used as a hammer.
5:10 PM · Oct 27, 2018·Twitter Web Client
 
Facebook
Maintenance Humor
May 30, 2020 ·
The three rules of maintenance
#1.  Always use the right tool for the job.
#2.  A hammer is the right tool for any job.
#3.  Anything can be used as a hammer.  😉
 
Twitter
Bob Kostic
@causticbob
The three laws of American Engineering:
1. Always use the right tool for the job.
2. A hammer is the right tool for any job.
3. Anything can be used as a hammer.
3:38 PM · Oct 27, 2020·Twitter Web App