Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
The slide rule is an instrument of analog computing, which exploits the properties of logarithms, returning more complex operations (products, quotients, exponentials) to simpler operations on logarithms of their operands. These are carried out graphically by moving one or more rods graduated with a logarithmic scale.
Censorship concept: everything in the message is deleted except words that read \
Armillary Sphere - Astrolabe Globe
Representing the passage of time, close-up of a sundial in the Cuban municipality of Rafael Freyre which is situated in Holguin Province.
vintage punched card for computer data storage and programming
Shenzhen, China -February 17 , 2024: Scientific sculpture from Fudan University in Shanghai, China, about early China, a device used to observe time in ancient China
Close-up of brass cryptex invented by Leonardo da Vinci from the book da vinci code. Word creativity as password set by letters rings. Cryptographic equipment printed on a 3D printer
Mexico City, Mexico - February 08, 2021: The Aztec calendar on belltower of Basilica of Our Lady of Guadalupe, Mexico City, Mexico, Mexico
Santa Clara, Cuba-October 14, 2019: American made vintage ouija board from 1919 -The Mystifying Oracle- showing the usual Latin alphabet letters, numbers 0-9, words yes-no-goodbye, and various symbols
Silver Bar
Women are a mystery or a woman is complicated to understand concept with the word woman spelled on a puzzle box or Cryptex. For most men, women tend to be an unsolvable enigma
Old golf scorecard
Scientific charts, cardiograms and mathematical calculations
Epitaph to Francis Lewis, one of the founding fathers and signatory on the Declaration of independence, in Trinity Church cemetery in the heart of the Wall Street Financial district of Manhattan.
A wall of license plate from Indonesia
East River, Manhattan, New York, USA - August 12th 2023: Posters telling how to get the bridge open, if you have a tall boat
Time lines in an abstract spiral
Footpath Sign to Cappelle Medicee (Medici Chapels) in Florence at Tuscany, Italy, among other commercial venues.
Number thirteen on a tailor's tape measure close up
Engineering tolerance table
laboratory equipment operating system control buttons.
Property deeds in canvas binders from a government records center
Cryptex device and vintage clock in the dark background 3d rendering
Simple multi colored financial figures spreadsheet, front view, wide horizontal composition
Shiney brass barrel of a cylinder numerical combination padlock. Illustrates security, protection and secrecy. Macro close up..
A kindergarten progress report card from the 1987 - 1988 school year. Math readiness.
demon word set up as a password to combination puzzle box (cryptex) with rings of letters; black background
Sundial on brick wall
Old typewriter patent stamp. OCTOBER 1894
Darmstadt, Hesse, Germany: the Hochzeitsturm, or \
Free Images: "bestof:Mannheim Slide Rule, Tavernier Gravet - MIT Slide Rule Collection - DSC03688.JPG en MIT Slide Rule Collection MIT Museum Cambridge Massachusetts USA The museum"
Terms of Use   Search of the Day