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The capacitors used by DRAM leak charge, and must be continually refreshed to maintain integrity, typically every few to a few hundred milliseconds, depending on the type of DRAM. Refreshing reads and writes the bits back to memory. SRAM does not require refreshing, and maintains integrity as long as power is supplied

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Static Random Access Memory (SRAM) is fast, expensive memory that uses small latches called “flip-flops” to store bits. Dynamic Random Access Memory (DRAM) stores bits in small capacitors (like small batteries), and is slower and cheaper than SRAM.
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Firmware stores small programs that do not change frequently, such as a computer’s BIOS (discussed below), or a router’s operating system and saved configuration. Various types of ROM chips may store firmware, including PROM, EPROM, and EEPROM.
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PROM (Programmable Read Only Memory) can be written to once, typically at the factory. EPROMs (Erasable Programmable Read Only Memory) and EEPROMs (Electrically Erasable Programmable Read Only Memory) may be “flashed,” or erased and written to multiple times.
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The term “flashing” derives from the use of EPROMs: flashing ultraviolet light on a small window on the chip erased the EPROM. The window was usually covered with foil to avoid accidental erasure due to exposure to light. EEPROMs are the modern type of ROM, electrically erasable via the use of flashing programs.
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A Programmable Logic Device (PLD) is a field-programmable device, which means it is programmed after it leaves the factory. EPROMs, EEPROMS, and Flash Memory are examples of PLDs.
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Flash Memory - Flash memory (such as USB thumb drives) is a specific type of EEPROM, used for small portable disk drives. The difference is any byte of an EEPROM may be written, while flash drives are written by (larger) sectors. This makes flash memory faster than EEPROMs, but still slower than magnetic disks.
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I like to go out if there's a party or go to the movies, but I just like hanging out with my buddies and having a good time.
Jean-Luc Bilodeau
ISIS is not an existential threat to something happening to someone in the United States of America. It's a serious problem overseas, but it's confusing and frightening.
Joe Biden
Every morning I jump out of bed and step on a landmine. The landmine is me.After the explosion, I spent the rest of the day putting the pieces together.
Ray Bradbury
Protect your good image from the eyes of negative viewers, who may look at your good appearance with an ugly fiendish eye, and ruin your positive qualities with their chemical infested tongues.
Michael Bassey Johnson
I published only in academic journals in philosophy until I was in my 40s, but I had been writing fiction and poetry my whole adult life - without ever once trying to publish it, and rarely letting anyone read it.
Cheryl Mendelson
I hate wearing makeup because I am just too lazy to take it off at night.
Irina Shayk
An invitation to a wedding invokes more trouble than a summons to a police court.
William Feather
A young woman in her teens has about 300,000 eggs in her ovaries. By the time she is menopausal, none are left.
Robert Winston
Experience shows that those people who were selected to be a head coach in the NFL met with more success if they had had head-coaching experience.
Bob McNair
As far as I'm concerned, Parnelli Jones was the greatest driver of his era. He had aggressiveness and also a finesse that no one else possessed. And he won with everything he put his hands on, including off-road.
Mario Andretti
We need to separate the process of evolution - which is, indeed, a self-serving process - and the actual motivations of animals.
Frans de Waal
I am enough.
Unknown
Whatever you are willing to put up with is exactly what you will have.
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I thank the Almighty for the most wonderful 18 years. Far, far, too short a time.
John Zimmerman
It was the spirit animating the mass and flowing from it, and it expressed the individuality of the building.
Louis Sullivan
There's more to life than movies.
Paul Walker
Traveling is the only passion that doesn't need to feel shy in front of intellect.
Lennart Meri
Our matriarchs had an interesting advantage over today's western women. Matriarchs didn't begin their marriage with love. Instead, they were taught how to love. They entered marriage with an earnest determination to grow a love that would sustain their marriage for a life time.
Michael Ben Zehabe
Hopefully we can build bridges but we also have to draw lines.
Fred Thompson
I don't sit around with other actors and talk about the pain and the magic of acting.
Rhys Ifans
Every trend in my high school was terrible! I used to wear my hair in a tight bun and let two long pieces hang in the front. I'd also wear really dark eyeliner and bright pink eyeshadow. For some reason, my friends and I thought it was really fashionable to wear a short tie with our uniforms.
India de Beaufort
Yoga is a big part of my life now. There's not a day that goes by where I don't do an Asana and mediation practice.
Giancarlo Esposito
Most of my confidence came from being with ladies, because I certainly wasn't getting any acting jobs.
Vin Diesel
I remember the first time I went to Europe, I had someone take a picture of me there, so I could really see myself there. There's a sense of being outside yourself, and I think celebrity allows us that too, to be outside ourselves.
Jess Walter