That’s twice the RAM of the iPad, which, like the new phone, sports a 1GHz Apple A4 processor. This means iPhone 4 buyers can expect some impressive performance gains over the 3G and 3GS.

“This is really about allowing [iOS 4's] limited multitasking to actually have a robust performance,” Rapid Repair CEO Aaron Vronko told Computerworld. “With only 256MB, the iPhone would waste a lot of time and battery power managing memory [during multitasking]. This definitely helps, and will let you keep more apps in the background without affecting battery life.”

[Image Credit: AppleInsider]

Industry sources tell the magazine that the device will feature a 960×640 pixel double-resolution display, enhanced with the same in-plane switching and fringe-field switching technology Apple used to improve viewing angle and readability in the iPad. The display panel itself is said to be 33 percent thinner than the one in its predecessors, presumably to allow for a larger battery.

Finally, the new iPhone is believed to run an A4 processor with 512MB of system RAM. In other words, it’s built with the same processor found in the iPad, but double the RAM. That would obviously make for an impressive smartphone, though it seems unlikely that Apple (AAPL) would outspec the iPad on that front so quickly after the latter’s debut.

Noticeably absent from the Digitimes report: Any mention of a front-facing camera for video chat. Odd, given what we’ve seen in the two prototype next-gen iPhones that have leaked to the wild.

In any event, Digitimes claims this iPhone will be announced on June 7 during Apple’s Worldwide Developers Conference and that Apple, in preparation for the launch, has placed an astonishingly large order for them with its manufacturing partner, Foxconn. The company has requested 4.5 million units for June and another 19.5 million for the rest of 2010, for a total of 24 million units.

[Image credit: Taoviet.nv]

• 600 MHz Samsung ARM processor
• 256MB system RAM
• a 3.2-megapixel camera with autofocus
• 32GB of storage
• a digital compass
• FM

These specs were submitted to a rumor site by someone who claims to have a friend inside Apple manufacturing partner Foxconn who has handled iPhone “model MB717LL 9.” As such, they should be taken with a grain of salt, if not an entire salt flat.

That said, the rumors do seem reasonable. A 600 MHz chip is a nice improvement over the a 400 MHz part in the current iPhone, as is the doubling of RAM to 256MB. FM transmission and reception capabilities have been rumored before as has the compass. What’s missing, however, is an improved battery, a better GPU–perhaps the PowerVR SGX that’s been rumored to be heading for the device, a new, more elegant housing less prone to those hairline cracks that seem to plague the current one, and–in a perfect world–an OLED display and a second front-facing camera for video conferencing. Of course if OS 3.0 proves to be even a third as robust as Apple claims, we’ll be so enamored of the device we might not notice any of those things are missing.

• 600 MHz Samsung ARM processor
• 256MB system RAM
• a 3.2-megapixel camera with autofocus
• 32GB of storage
• a digital compass
• FM

These specs were submitted to a rumor site by someone who claims to have a friend inside Apple manufacturing partner Foxconn who has handled iPhone “model MB717LL 9.” As such, they should be taken with a grain of salt, if not an entire salt flat.

That said, the rumors do seem reasonable. A 600 MHz chip is a nice improvement over the a 400 MHz part in the current iPhone, as is the doubling of RAM to 256MB. FM transmission and reception capabilities have been rumored before as has the compass. What’s missing, however, is an improved battery, a better GPU–perhaps the PowerVR SGX that’s been rumored to be heading for the device, a new, more elegant housing less prone to those hairline cracks that seem to plague the current one, and–in a perfect world–an OLED display and a second front-facing camera for video conferencing. Of course if OS 3.0 proves to be even a third as robust as Apple claims, we’ll be so enamored of the device we might not notice any of those things are missing.

In your spring buyer’s guide, you wrote that adequate graphics chips will be more important than ever, but in the past you’ve advised that memory, or RAM, was key to speed and performance. Can you now get the same gains by buying or adding a better graphics chip? Or is RAM just as important as ever?

There are lots of things that can improve the performance of a PC or Mac. But adding memory still gives you more bang for the buck than any other, in my view. What I was saying last week is that the forthcoming Microsoft and Apple operating systems will be relying more on graphics chips to help take some of the load off the main processor and speed up certain tasks. Even so, a better graphics chip isn’t a substitute for more main memory. In fact, most moderately priced computers use so-called integrated graphics chips, which lack dedicated memory and share some of the computer’s main RAM. So having plenty of main memory is directly related to getting the most out of such graphics chips.

Can the iPhone be connected to desktop peripherals? I want to be able to plug my iPhone into a large monitor and printer.

There are already several apps, including one from Hewlett-Packard, that allow you to print photos wirelessly from an iPhone to a printer that’s connected to a Wi-Fi network. But, as far as I know, there is nothing on the market today that can connect an iPhone to an external monitor or keyboard, or to a printer for nonphoto printing. However, Apple has announced that the new 3.0 version of the iPhone operating system, due this summer, will enhance the ability of the iPhone to work with add-on hardware, either via cables or wirelessly. The company showed this off with medical devices, but it’s possible that some third party could make it work with monitors or printers or keyboards.

A recent article in the Journal reported that a person had installed the Mac operating system on a Windows laptop. Is this really possible and is it legal?

Apple doesn’t sell or license its Mac OS X operating system for use on non-Apple hardware. In fact, the company considers it illegal to install OS X on other brands of computers. Nor does it produce OS X drivers for non-Apple hardware features that are built into competitors’ computers. Nevertheless, some computer hobbyists have installed OS X on non-Apple hardware, and posted photos and videos online to prove it.

Even if you are willing to ignore the legal issues, this process, while not brain surgery, takes more skill than the average user possesses. And, in the end, some features of the computer may wind up disabled or require workarounds to function. For instance, on one such machine I saw, the speaker port didn’t work with the Mac OS.

• You can find Mossberg’s Mailbox, and my other columns, online free of charge at the new All Things Digital Web site, http://walt.allthingsd.com.

I bought a Compaq Presario notebook that came with many games that I don’t use. Can I increase the available memory by deleting all of the games?

You can increase the disk storage space that’s available to you by deleting the games, which take up room on your hard disk. But that isn’t the same as increasing “available memory.” Memory is the capacity of the computer to manage data at any one moment, and it is governed by the random-access memory, or RAM, inside the machine. Unless any of the games, or some game-launching programs, are automatically loading into memory when your PC starts up, the games aren’t wasting memory, just disk space. Getting rid of the games is still a good idea, but don’t try to do so by simply deleting them, as you would a file. You should do it by properly uninstalling them using the Windows uninstaller control panel, which is called “Add or Remove Programs” in Windows XP, and “Programs and Features” in Windows Vista.

I plan to buy an Intel-based Mac. I will need to run some Windows software for school. If I use Parallels to run Windows and the Mac operating system simultaneously, and someone does happen to get me with a Windows virus, can that migrate over to the Macintosh side of my computer?

First of all, I can’t stress enough that anyone running Windows, on any hardware — even an Apple computer — should obtain, install and run Windows security software, including antivirus and antispyware software. I do so, not only on my physical Windows computers, but on the virtual Windows computers that run on my Macs via Parallels. Even if you are using Apple’s own Boot Camp solution for running Windows on a Mac, which doesn’t allow the two operating systems to run simultaneously, you should be running security software on the Windows side. Such security software is primarily intended to protect the Windows environment on a Mac. It is unlikely that a Windows virus could migrate onto the part of the computer controlled by the Mac operating system, and even if it did, it couldn’t run there if it was written strictly for use in Windows. It could run only in the faux Windows computer created by Parallels. However, the people who write malicious software are relentless and creative, and it’s impossible to rule out anything they might try, or do. There is one danger to your Mac in this scenario. Parallels includes an optional feature that allows Windows, and Windows programs, to access folders and files on the Mac side of the machine. If you turn on this file-sharing feature, and if you get a virus whose purpose is to delete or corrupt files, it could attack these Mac files, because Windows has access to them. So, for maximum security, I’d advise that you leave this feature off. But, even if you do so, you should still obtain, install and use Windows security software for use when running Windows.

In your column last week about the Ooma device that gives you free domestic phone calls over the Internet, you mentioned that, until the product goes on sale in September, the company is giving away 1,500 free models, but only to people who have been given a special token by existing owners. Can I get one of your tokens?

Sorry, even if I had been sent enough tokens to fulfill the numerous requests I got, I couldn’t fulfill them. I am sending my few tokens back to the company, along with the Ooma gear I was lent for my testing. For ethical reasons, I don’t keep the products companies lend me for review, or take anything of value from them, including tokens entitling people to get a $399 product free of charge. Nor can I help the numerous other readers who asked me to get them on Ooma’s free distribution list.

You can find Mossberg’s Mailbox, and my other columns, online free of charge at the new All Things Digital Web site, http://walt.allthingsd.com.

Write to Walter S. Mossberg at mossberg@wsj.com

And like the technologies themselves, digital jargon changes and expands all the time. Just when you thought you’d mastered stuff like RAM (computer memory) and GSM (the cellphone technology invented in Europe), new terms pop up like weeds on your lawn.

So here’s a quick and dirty glossary designed to make holiday shopping for the latest tech products feel less like taking the SATs.

Computers

Some of the newest terminology to know when you’re shopping for a computer, whether it be a Windows PC or an Apple Macintosh, involves the processor, the chip that’s the brain of the box. Until recently, most consumer computers had a single processor. Now it’s common to find them with so-called dual cores, which in effect means two processors packaged into one chip. Two cores won’t make your word processing or email go any faster, but they do potentially give you more horsepower for such heavy-duty tasks as gaming or video editing. I say “potentially,” because to make the most of a dual-core processor, you need software that sends some work to each core, and most programs are not yet designed to do that.

The labeling of these new processors is also confusing. Intel called its first consumer laptop dual-core chip the “Core Duo”; now there’s a second generation known as the “Core 2 Duo.” (In techland, apparently, the “2 Duo” moniker is assumed to be crystal clear.) And there are still some single-core Intel processors, dubbed “Core Solo.”

For laptops in general, one of the latest terms you’ll encounter is “ExpressCard,” which refers to the new version of that slot on the side of the machine into which you can pop a wireless receiver or some other add-on. For years these slots have adhered to a standard called “PC Card,” but the latest laptops are showing up with slots that follow the new ExpressCard standard. Worse yet for confused consumers, it comes in two flavors: a narrower one called ExpressCard/34, and a wider one called ExpressCard/54. And naturally, neither can accept cards designed for the older, PC Card standard.

Cellphones

One hardly knows where to begin when talking about cellphone jargon. But an obvious source of confusion is the baffling nomenclature being given to the various new high-speed cellphone networks that can transmit a wide assortment of material — music, video clips and web sites — to phones at speeds rivaling home broadband.

If you’re shopping for a phone at Verizon or Sprint, the high-speed capability is called “EVDO” or “EV-DO” (which stands for Evolution Data Only or Evolution Data Optimized). At Cingular, it’s known as “HSDPA” (for High-Speed Downlink Packet Access).

Since T-Mobile doesn’t have a network in this speed class, salespeople there will brag instead about “EDGE” (Enhanced Data Rates for Global Evolution), which, despite its aspirational name, is a much slower technology.

TV

Buying a television used to be simple. No more. There’s a whole new vocabulary for digital TV shopping. It’s too expansive to cover completely in this space, but here are a few select terms.

In addition to the familiar plasma and LCD (liquid crystal display) sets, which have an expensive digital panel at the front, there’s now a third type of screen, called a “microdisplay.” This is actually a rear-projection television, although much skinnier than the old behemoths. There are three main microdisplay types. Each uses a different sort of very small digital circuit in the rear of the set to generate the picture, which is then projected onto the large screen at the front. And naturally, each has its own jargony name. The first, called “DLP” (digital light processing), uses a special chip loaded with minuscule mirrors. The second, confusingly called “LCD,” uses a tiny LCD chip. The third, “LCoS” (liquid crystal on silicon), is sort of a hybrid of the other two, in that it uses both liquid crystals and mirrors.

And don’t forget the digital video recorder — the now almost mandatory add-on used to record and save programs on hard disks inside cable and satellite receivers or inside a stand-alone unit — which unfortunately goes by two names. Sometimes it’s called a “DVR” (digital video recorder) and sometimes a “PVR” (personal video recorder), but really, they’re the same thing. You might even hear the technology referred to as “TiVo,” which is actually the best-known brand of digital video recorder. Think of TiVo as the Kleenex of DVRs — its name is sometimes used as a generic term for the whole category.

Wireless

Wi-Fi wireless networks are now pretty familiar. Many people even know they come in two main speeds, designated by letters. The “b” variety, which was the first version to gain public acceptance, was succeeded by the “g” variety, which is faster and backwards-compatible with “b.”

Nice and simple, right? Not for long. Chaos has come to the Wi-Fi world in the form of a new standard,”n,” which is supposedly even faster than “g” and, more important, offers longer range. The problem is, the engineering committee that sets such standards has been taking forever to certify “n,” so companies have begun selling Wi-Fi gear that purports to use the “n” standard in some form but may not be compatible with it when it finally emerges. Last year there were “pre-n” products, which used some parts of the emerging standard; this year there are “draft-n” products, based on a draft of the proposed “n” standard. Stay tuned for the real thing.

But the most important Wi-Fi term of the moment is “MIMO,” short for multiple-input multiple-output. This is a technique that can greatly improve range and speed by capturing formerly stray parts of a wireless signal and merging them. It is expected to be a key component of the “n” standard, but is already in some “g” products, as well as in the “pre-n” and “draft-n” products.

Broadband

There are two main types of high-speed Internet service: DSL (digital subscriber line) is sold by phone companies, while cable modem service is sold by cable companies. Most people know these terms.

But now there’s a third type, called “fiber optic,” being sold in some parts of the country. This technology uses glass fibers, lit up by a laser and connected directly to your home. (Some other systems use fiber under the street, but not running right up to the house.) The best-known brand of fiber-to-the-home broadband service is Verizon’s “FiOS,” which can deliver TV channels as well as the Internet.

All broadband service providers boast about their speed, and they tend to do so in techie jargon. Slower broadband is measured in kilobits per second, abbreviated as “kbps.” Faster speeds are clocked as megabits per second, or “mbps.” (Note that these terms end in bit, not byte. The latter ending is normally used as a measure of storage capacity, not speed.) One megabit equals 1,000 kilobits. So a DSL line that tops out at 768 kilobits per second, for example, isn’t nearly as fast as one that registers three megabits per second.

Music

Almost everybody knows that MP3 (MPEG-1 Audio Layer 3) is the most common format for digital music files. But what is AAC? And how about WMA?

All of the above are compressed formats, meaning they take a song that would occupy lots of space on a disk and squeeze it down to a fraction of its original size while trying to preserve the sound. AAC (Advanced Audio Coding) is an industry-standard music-compression format favored by Apple, while WMA (Windows Media Audio) is a proprietary music-compression format that is owned and used by Microsoft. Which of the three you prefer depends on your taste.

Both AAC and WMA are available in two versions. One is an “open” version, which gets created when consumers convert their CDs into these digital formats, and imposes no restrictions on usage. The second is an encrypted, or copy-protected, version, which includes code that restricts how often and under what circumstances the song can be played or copied. Songs sold at Apple’s iTunes Music Store are in the encrypted version of AAC, while songs sold by music services that use Microsoft software are sold in the encrypted version of WMA, meaning there are limits to what you can do with these files.