1

Duct tape

Image: Lucas van Oort

One of the most useful things to have around is, without a doubt, duct tape. This product can help fix an endless number of everyday problems in virtually any environment.

This adhesive tape was invented during World War II by a division of Johnson & Johnson called Revolite. It was initially used to seal ammunition cases because of its water-resistant properties.

2

GPS

Image: henry perks

The GPS technology we all use daily on our smartphones to navigate from point A to point B was originally developed by the U.S. military. It was designed to track the position of military units and help them find their way efficiently across any terrain —much like how we use it today for civilian purposes.

3

Internet

Image: Glenn Carstens-Peters

Few technologies have become such a big part of our lives in just a couple of decades as the Internet. Its origins trace back to the 1970s, when the Defense Advanced Research Projects Agency (DARPA) created an interconnected network linking military centers to enable resource sharing.

The connection of commercial networks and enterprises by the early 1990s, along with the advent of the World Wide Web, marked the beginning of the transition to the modern Internet.

4

Walkie-talkie

Image: garrett parker

From children’s toys to invaluable communication devices used in critical situations, walkie-talkies are a common fixture in modern life. Their development during World War II has been variously credited to Donald Hings, radio engineer Alfred J. Gross, Henryk Magnuski, and engineering teams at Motorola.

Initially used by infantry, similar designs were created for field artillery and tank units. After the war, walkie-talkies spread to public safety and eventually commercial use.

5

Microwave oven

Image: Erik Mclean

Believe it or not, microwave cooking was accidentally discovered during a military-related project just after World War II.

In 1946, Percy Spencer, a scientist working on a magnetron at Raytheon, noticed that a peanut cluster candy bar in his pocket had melted from the magnetron’s microwave radiation. Curious to experiment further, he brought in some kernels of corn and made the first-ever microwave popcorn—leading to the invention of the microwave oven.

6

Super glue

Image: Scott Sanker

In 1942, a research chemist working for a defense contractor was developing a high-precision targeting sight for weapons. Although the project didn’t produce the expected results, the resulting product was incredibly sticky , leading to the creation of the now-famous Super Glue.

7

Aviator sunglasses

Image: Griffin Wooldridge

Aviator sunglasses were developed in the 1930s as a lighter alternative to the bulky goggles worn by pilots during the early years of aviation. Those goggles were heavy, uncomfortable to wear, and prone to fogging up mid-flight.

Colonel John Macready of the U.S. Army Air Corps helped develop the first set of aviator sunglasses, which became known as Ray-Bans—named for their purpose: banning the sun’s rays from a pilot’s eyes.

8

Packaged salad mixes

Image: Nathenia Landers

The bags of packaged salad mixes found at any local supermarket use "modified atmosphere packaging" to delay ripening and spoilage.

This technology was developed in the 1960s through a collaboration between Whirlpool Corp. and the U.S. Navy to send fresh lettuce and celery to troops in Vietnam .

9

Bug spray

Image: Wolfgang Hasselmann

The active ingredient in most insect repellents, known as DEET, was developed by the U.S. Army in 1946 for use by military personnel operating in insect-infested areas . The product’s success led to its commercial release.

10

Disposable sanitary pads

Image: Annika Gordon

During World War I, Kimberly-Clark invented Cellucotton, a wood pulp–based material designed to be more absorbent and cost-effective for use in bandages.

After the war, the company discovered that Army nurses had repurposed Cellucotton as sanitary napkins , which inspired the creation of Kotex—the first disposable sanitary pads.

11

Frozen juice concentrate

Image: Fotografía de Alimentos

In 1942, USDA scientists developed frozen concentrated orange juice during World War II to help provide soldiers with sufficient Vitamin C . Although it was never distributed to the military, the product was later introduced to consumers by Minute Maid.

12

WD-40

Image: Daniel Campbell

WD-40, now a common household product, was originally developed in 1953 to prevent rust and corrosion on the outer shell of the Atlas missile . Created by the Rocket Chemical Company, the name WD-40 stands for "water displacement," with the "40" representing the number of attempts it took to perfect the formula.

1

House Size

Image: Esther Zheng

One of the very first things any prospective homeowner should ask themselves is what kind of house they want . Having a general idea of the size, as well as the amount and type of spaces needed, is considered basic information before starting to look for a property.

2

Roof Condition

Image: Andreas Weiland

For practical reasons, most people looking to buy a house don’t inspect the roof of a prospective home. However, that section of the house can present serious and costly problems if it has any kind of damage.

Asking about the condition of the roof is paramount. How old is it? What is it made of? Buyers can find this information on the seller’s disclosure or ask the real estate agent to find out. Asphalt shingle roofs last around 20 years, but other materials, like clay or metal, can last much longer.

3

Neighborhood Safety

Image: Alev Takil

It goes without saying: safety is a big thing. When searching for a home, make sure the neighborhood where a potential house is located is safe. It’s also highly advisable to check out the neighborhood from an insider’s perspective via social media, such as Facebook groups, where you can learn more about the area and ask locals questions.

If you’re truly interested in a particular home, spend some time in the neighborhood. Go for a walk and check out local businesses to get a feel for what it’s like to live in the area.

4

HVAC system

Image: Taylor Vick

The HVAC system heats and cools a house year-round. Anyone looking at houses should ask about the type of heating and cooling system each one has and, most importantly, how old it is. Asking for maintenance records is also a good idea.

Furnaces and AC units typically last anywhere from 10 to 25 years. If a unit is broken, repair costs vary based on the type of system and how big it is. Homeowners can spend an average of $7,000 to replace an existing HVAC unit—but don’t count on a home warranty to automatically cover that.

5

Property Taxes

Image: Recha Oktaviani

A commonly overlooked item for first-time homeowners when searching for a house is property taxes. When considering a potential home, always compare property tax amounts over several years to help you calculate the overall affordability of the property .

To find out a home's estimated property taxes, check with the county's appraisal board. Homeowners Association dues should be listed in the home's listing, or you can request them from the listing agent.

6

Plumbing

Image: PAN XIAOZHEN

The plumbing system in a house can be a mystery for a prospective buyer if they don't know how to inspect it properly. Pipe disintegration, obstructive tree root growth, and complicated clogs can all cause havoc on the system. Keep in mind that sewer line replacement can cost anywhere from $1,300 to $4,900.

Always check toilets for leaks, unstable bases, and discoloration . Look under the bathroom and kitchen sinks for signs of leaks. Turn on the hot water in the sink or tub to see if it gets hot. If it doesn’t, that could indicate a problem with the water heater.

7

Water damage and mold

Image: Hydra 4x

Water damage can cause numerous problems in a house, including structural issues, mold, and rot, especially in basements. Anyone inspecting a house should pay close attention to musty smells as well as water stains on floors, walls, or ceilings .

The cost of mold removal can be anywhere from a few hundred to a few thousand dollars, depending on the size of the affected area. And, because mold is a health hazard, it should be treated before moving in.

8

Proper ventilation

Image: Jelleke Vanooteghem

This one might be subtle, but it’s very important, especially when considering the mold issues mentioned earlier. Without adequate interior ventilation, moisture can't evaporate , which can turn a room into a breeding ground for mold.

Look for condensation on windows or slightly bubbled or peeling paint around windows, doors, or vents. These signs may indicate moisture within the walls or ceiling drywall.

9

Noise Level

Image: Rei Kim

Nobody wants to live in a noisy home. But, at the same time, this issue is often overlooked when searching for houses. Many showings are cunningly scheduled during quiet hours to disguise the noise issues.

If you are truly interested in a property, visit during high-traffic hours to assess this concern . Even if the house is perfect in every other way, the constant hum of passing cars, public transport, or other sources of noise can become a serious problem.

10

Foundation and home exteriors

Image: Aiden Craver

Foundations matter. Bulging or bowing foundation walls are signs of structural weakness that can be expensive to repair. Always check for cracks in the foundation, drywall, or ceiling ; gaps above doors and windows ; sunken stairs or porches; and sloping or uneven floors or tiling.

Of course, not every crack means the home is about to collapse. Every home experiences some degree of settling, so some cracks are to be expected.

11

Electricity issues

Image: Mila Albrecht

The electrical system in a house can be compared to the nervous system of a human being: every part must work properly, and issues can sometimes be difficult to spot. From the power outlet next to the bed to other electrical systems in the house, like the garage door opener, everything is important and contributes to your safety and comfort. Bring a phone charger and plug it into random sockets to check if they work properly .

12

Room for improvement

Image: Daniel McCullough

Buying a house is a big investment and you can be living in it for a very long time. Therefore, it is always important to take into consideration any future plans and whether these plans make sense in that particular house.

Is there a wall you could knock out to create more space if needed? A garage or attic you could potentially finish if you need an extra room? Having an easy-to-modify layout can provide more possibilities for the future.

1

Every customer deserves a warm greeting

Image: Fotos

It might sound strange these days, but there was a time when walking into a store without acknowledgment was once considered bad service . Clerks were expected to smile, make eye contact, and greet customers promptly.

That greeting also set expectations. It told customers help was available and that their presence mattered. For many Americans, being welcomed was just as important as the product itself.

2

Anticipating needs before being asked

Image: SERGEI BEZZUBOV

Good service meant paying attention. A waiter refilled the water before the glasses were empty. A clerk offered assistance before confusion set in. Anticipation showed experience and pride in the job, not pushiness .

Customers noticed these small gestures. They made interactions smoother and more personal, creating the feeling that service was thoughtful rather than reactive or scripted.

3

Quick service shows respect for time

Image: Brad Rucker

Old-school service emphasized quick acknowledgement, even if immediate help wasn’t possible. Letting customers wait without explanation was considered rude . A simple "I’ll be right with you" went a long way.

Speed mattered, but calm mattered more. The goal was efficiency without rushing, making customers feel valued rather than hurried through an interaction.

4

Courtesy is non-negotiable

Image: Vitaly Gariev

"Please" and "thank you" were mandatory words in customer service. These phrases weren’t optional politeness, they were expected standards that showed mutual respect between employee and customer.

Their absence was noticeable. Courtesy made transactions feel human and cooperative, reminding customers they were being served by people and not being processed by a system.

5

Eye contact means attention

Image: Petr Sevcovic

Maintaining eye contact was a core part of service etiquette. It showed that the employee was listening and engaged , not distracted or indifferent. Customers felt acknowledged simply by being looked at.

Avoiding eye contact suggested boredom or disinterest. In traditional service culture, body language carried as much weight as spoken words.

6

Know the product by heart

Image: Lefteris kallergis

Employees were expected to know their products or menus thoroughly. Having to constantly check references or ask others weakened customer confidence and slowed service.

Product knowledge signaled competence and pride . Customers trusted businesses more when employees spoke clearly and confidently about what they sold.

7

Personal conversations stay private

Image: Vitaly Gariev

Chatting about personal matters within earshot of customers was strongly discouraged. Service time belonged to the customer, not coworkers’ off-duty lives .

This rule reinforced focus and professionalism. Customers expected attention, not background noise that suggested distraction or disinterest.

8

Complaints are handled calmly

Image: Amir mohammad jafari

Arguing with customers was seen as a failure of service. Employees were trained to listen first, apologize when appropriate, and resolve issues without defensiveness .

Even when customers were wrong, maintaining calm preserved dignity of both sides. The goal was always resolution, never confrontation.

9

Regular customers are remembered

Image: Vitaly Gariev

Recognizing repeat customers by name or preference was common practice . It made people feel valued and turned routine visits into familiar experiences.

This personal recognition built loyalty long before reward cards existed. Customers returned because they felt known, not tracked.

10

Cleanliness is godliness

Image: Alexander Mils

A clean counter or dining area signaled care and attention. Customers assumed that if visible areas were clean, unseen operations were handled in the same manner .

Cleanliness wasn’t just decorative, it was reassuring. It quietly communicated reliability and professionalism.

11

Customer privacy is sacred

Image: Taylor Davidson

What happened during a transaction stayed there . Discussing customers outside the interaction was considered extremely unprofessional and disrespectful.

Trust was part of the service experience. Customers expected discretion, especially in smaller communities where word traveled quickly.