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Silhouette of people standing inside Haleakala Observatory watching the sunset through the windows. Original public domain… Free Image from public domain license 
GAETA, Italy. Cryptologic Technician (Technical) Seaman Elizabeth Hall, assigned to the Blue Ridge-class command and control… Free Image from public domain license 
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A typing blogger’s hand with a ring on a computer-mac working online and coding in an office.. Original public domain image… Free Image from public domain license 
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Interior with framed portrait of woman and potted plant on white table. Original public domain image from Wikimedia Commons Free Image from public domain license 
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Diamond Peak, United States. Original public domain image from Wikimedia Commons Free Image from public domain license 
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County Executive Director Nikki Onuoha and Program Technician Debra Sudeen at the Farm Service Agency Royal Palm Beach… Free Image from public domain license 
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Close-up of an industrial coffee machine. Original public domain image from Wikimedia Commons Free Image from public domain license 
Los Angeles, United States. Original public domain image from Wikimedia Commons Free Image from public domain license 
Rory's StoryRory Hamill, U.S. Marine, veteran of Iraq and Afghanistan. A photo series that followed segments of his life.… Free Image from public domain license 
A desk set containing an iPhone (4/4s), a MacBook Air, a notebook with a pencil on top and an espresso cup.. Original public… Free Image from public domain license 
A man working on a laptop at a table with a mug and two iPhones. Original public domain image from Wikimedia Commons Free Image from public domain license 
Cardiologists assigned to Naval Medical Center San Diego (NMCSD) perform a catheterization procedure using a C-arm X-ray… Free Image from public domain license 
MedUSA, a large-scale 3D printing platform at the Manufacturing Demonstration Facility at Oak Ridge National Laboratory.… Free Image from public domain license 
Control room at the Niagara Mohawk Power Corporation's 500,000-kilowatt nuclear station, is the nerve center for the entire… Free Image from public domain license 
Tilt shift lens photography of silver iMac on table. Original public domain image from Wikimedia Commons Free Image from public domain license 
A Sandia researcher examines the set-up used to test diode lasers as an alternative to led lighting. Original public domain… Free Image from public domain license 
Float cam. Original public domain image from Wikimedia Commons Free Image from public domain license 
A hairdresser gives a haircut at Abdulqadir Abdul's newly opened barber shop in Mogadishu, Somalia, on January 20. AU UN IST… Free Image from public domain license 
Marines discuss issues with a local town councilU.S. Marine Capt. Kenneth J. Del Mazo (left), Commanding Officer Battery I… Free Image from public domain license 
A minimally decorated room with a computer desk, a graphics tablet and a guitar against an orange wall. Original public… Free Image from public domain license 
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A small home office with a surfing board in the corner next to a desk on wheels. Original public domain image from Wikimedia… Free Image from public domain license 
Green leafy bouquet atop a stone patio outdoors. Original public domain image from Wikimedia Commons Free Image from public domain license 
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Hotel National, Moscow. View of Manezhnaya Square and Red Square from the upper floor room (only the upper floor has a… Free Image from public domain license 
Warsaw, Poland. Original public domain image from Wikimedia Commons Free Image from public domain license 
Cat through doorway in Berlin home kitchen with yellow watering can in background. Original public domain image from… Free Image from public domain license 
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Mirror Mirror. Original public domain image from Wikimedia Commons Free Image from public domain license 
A man taking a picture with a digital camera. Original public domain image from Wikimedia Commons Free Image from public domain license 
A keyboard and a mug next to a laptop on a wooden surface. Original public domain image from Wikimedia Commons Free Image from public domain license 
Side shot of an open MacBook. Original public domain image from Wikimedia Commons Free Image from public domain license 
A man's hands typing on a laptop on a white desktop with a potted plant. Original public domain image from Wikimedia Commons Free Image from public domain license 
A MacBook next to a stack of books on a wooden desk. Original public domain image from Wikimedia Commons Free Image from public domain license 
Tables and cushions in a cafe interior in Istanbul. Original public domain image from Wikimedia Commons Free Image from public domain license 
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White police car in front of a green stop light patrolling near The White House. Original public domain image from Wikimedia… Free Image from public domain license 
Close-up of a person's hands on the keyboard of a MacBook. Original public domain image from Wikimedia Commons Free Image from public domain license 
An iPhone near a pair of headphones and a small speaker on a computer desk. Original public domain image from Wikimedia… Free Image from public domain license 
Milford Sound, New Zealand. Original public domain image from Wikimedia Commons Free Image from public domain license 
The Ecuadorian Navy sail training ship BAE Guayas (BE 21) sails past the Statue of Liberty in New York May 23, 2012, to… Free Image from public domain license 
A typewriter and a lamp sitting on a desk Bowen Island. Original public domain image from Wikimedia Commons Free Image from public domain license 
The advanced light source (als), a division of Lawrence Berkeley National Laboratory, is a national user facility that… Free Image from public domain license 
A busy living room with various trinkets and decorations and a window looking out on the street. Original public domain image… Free Image from public domain license 
A delegate from Somaliland votes during the ongoing electoral process in Mogadishu, Somalia, on December 14, 2016. AMISOM… Free Image from public domain license 
Marlene Weisman operating the mass spectrometer in the analytical lab building (of the magnetic-deflection type, used for the… Free Image from public domain license 
The Toronto sign at night, on September 3, 2015. Original public domain image from Wikimedia Commons Free Image from public domain license 
New characterization equipment in place at the Manufacturing Demonstration Facility at Oak Ridge National Laboratory.… Free Image from public domain license 
Interior of a dining hall with a large fireplace in the center.. Original public domain image from Wikimedia Commons Free Image from public domain license 
Metropolitan City of Venice, Italy. Original public domain image from Wikimedia Commons Free Image from public domain license 
National Magnetic Fusion Energy Computer Center (NERSC) hopper supercomputer cluster at the Oakland Scientific Facility… Free Image from public domain license 
Ankara Kalesi, Turkey. Original public domain image from Wikimedia Commons Free Image from public domain license 
Miraflores, Peru. Original public domain image from Wikimedia Commons Free Image from public domain license 
Nersc Cray Edison supercomputer cluster at the oakland scientific facility. Edison is a Cray XC30 with peak performance of… Free Image from public domain license 
An overhead shot of wooden boats with oars inside moored at a jetty. Original public domain image from Wikimedia Commons Free Image from public domain license 
Hands holding iPhone taking photo of abstract colorful graffiti art. Original public domain image from Wikimedia Commons Free Image from public domain license 
Cobox, Cremona, Italy. Original public domain image from Wikimedia Commons Free Image from public domain license 
The viewfinder of a camera shows a photo of the sunset.. Original public domain image from Wikimedia Commons Free Image from public domain license 
Red and orange cherry tomatoes and other vegetables on a market stall. Original public domain image from Wikimedia Commons Free Image from public domain license 
Shown is a biochip slide, which has hundreds to thousands of gel drops on a glass, plastic or membrane support at Argonne… Free Image from public domain license 
An over-the-shoulder shot of a person taking a photo with a smartphone. Original public domain image from Wikimedia Commons Free Image from public domain license 
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U.S. Navy Operations Specialist 2nd Class Paul Davis mans a watch station in the combat information center aboard the guided… Free Image from public domain license 