A DC voltage in a power supply. A computer's power supply converts AC power into several DC voltages (typically 3.3v, 5v and 12v), each of which is known as a rail. See also The Rail.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2008 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Oil climbs peak, economies plumb depressions and the future will not imitate the past
- To maintain any modicum of modern life countries and individuals will increasingly turn to electricity generated from renewable sources. There is no way to dramatically increase the world's oil production, now or in some dreamy future. All the major fossil fuels will be in declining supply by 2025...
- Blog posts 2008-07-01
- What putting off health care means
- What putting off health care meansPreventionI used to get severe headaches occasionally migraine whenever the weather changed. If a thunderstorm was coming, I would get a bad headache. When the weather was turning nice again, I would get a severe headache. I had a couple of dental...
- Discussion threads 2008-06-30
- First scientist to warn Congress on Global Warming: It's certain and we're certainly out of time.
- First scientist to warn Congress on Global Warming: It's certain and we're certainly out of time.It's the sun, stupid.The earth has been cooling for the last 10 years. If the current low solar activity keeps up, we could be in deep doodoo.RE: First scientist to warn Congress on Global...
- Discussion threads 2008-06-23
- iPhones, PPC, and DLC
- iPhones, PPC, and DLCheh.http://www.virtual-laser-keyboard.com/is offline.Ever considered warning people before you link their site into a blog that sees heavy traffic?Apple designs the chips...... but doesn't make them and the PA Semi acquisition doesn't change that. Apparently from the linked article Samsung provided the manufacturing. That could mean Applehas...
- Discussion threads 2008-06-19
- Can Silicon Valley's San Jose find its way?
- San Jose suffered a massive calamity just a few years ago that cost it 225,000 jobs - nearly one quarter of its entire population - the worst job loss anywhere in the US since the Great Depression. The dotcom dotbomb from 2001 to 2003 was a period...
- Blog posts 2008-06-18
- There'a zero-emission car now, but you can't have one. BTW: the Pres doesn't wanna hear you "squawk" about gasoline prices.
- There'a zero-emission car now, but you can't have one. BTW: the Pres doesn't wanna hear you "squawk" about gasoline prices.Talk to the elbow...Please add me to the list of people who don't want to hear whining about higher gas prices. No, I don't like having to pay more...
- Discussion threads 2008-06-16
- Yo Philly: iSepta perfect for Philly iPhone users
- Having spent almost 20 years in Philadelphia iSepta is one application that I can relate to. SEPTA, for the uninitiated, is the South Eastern Pennsylvania Transportation Authority. SEPTA runs Philly's popular Regional Rail line which is a series of trains that connects downtown Philadelphia with its suburbs....
- Blog posts 2008-05-20
- Railway Ticketing Agency Improves Performance and Eases IT Management
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- Case studies 2008-05-01
- Discover this: "Discover" and its own carbon footprint
- "Discover" Magazine profiled their own publication's carbon footprint. Here's the whole article, a brave move not likely to be popular among mag publishers. Here's some of what they found: "Two and one-tenth pounds of carbon dioxide. That is our best estimate of what is emitted...
- Blog posts 2008-04-30
- Volvo recall due to airbag software problems
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- Blog posts 2008-04-30
- iPhone coming to Canada
- iPhone coming to CanadaAs a Rogers customerI'm really curious to see what data rates Apple has squeezed out of Rogers.Wireless Telcos in Canada are keeping basic data-only packages high to I suspect use the bandwidth to sell higher margin nonsense like TV and their own silly downloads.Personally, I hope Apple...
- Discussion threads 2008-04-29
- Psystar: Go-to-jail-free card
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- Discussion threads 2008-04-17
- Psystar: We're legit, but our merchant gateway dropped us
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- Discussion threads 2008-04-17
- 55W PC power supply powering the dual-core computer
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- Discussion threads 2008-03-26
- Sony PCM-D50
- Photo gallery:Sony PCM-D50Remember when consumer audio gadgets included a record button? If you're looking for a modern update to the portable cassette recorders of yesterday, or you need a practical solution for capturing concerts or interviews, the Sony PCM-D50 handheld audio recorder ($599) is a worthwhile investment. DesignThe Sony...
- Product reviews 2008-03-24
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- Blog posts 2008-03-18
- Railway Organisation Saves $200,000 With Simplified IT Infrastructure
- Botswana Railways wanted to improve operations in order to make rail more attractive to freight companies. A vital part of the plan involved simplifying its IT environment. As it stood, the infrastructure was inefficient and complicated to manage, which prohibited the deployment of the latest applications. Botswana Railways took advantage...
- Case studies 2008-03-07
- French court says site cannot grade teachers
- French court says site cannot grade teachersActually, one could conclude thatit is up to students to hail or rail against the pros and cons of their teachers real issues not rants or raves, not necessarily on the grounds of their teachers educational credentials, but on the manner of their teaching,...
- Discussion threads 2008-03-03
- Apple to make iPhone SDK 'roadmap' announcement next week
- Apple to make iPhone SDK 'roadmap' announcement next weekgetting into businessApple seem to finally be serious about getting into business ... from the top down rather than the bottom up: they've played to their strengths and made the phone and the laptop most likely to be desired by the bosses......
- Discussion threads 2008-02-27
- ISP turns over hundreds of email accounts to FBI
- ISP turns over hundreds of email accounts to FBIThe Constitution was lost due to a technical glitchI suppose some day soon, we will be told that we no longer have any rights protected by the U.S. Constitution. They will have been lost due to a "technical glitch". I...
- Discussion threads 2008-02-19
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