Here are a few questions about computers I’ve received recently from people like you, and my answers. I have edited and restated the questions a bit, for readability. This week my mailbox contained questions about whether to buy a smart phone now or wait for the iPhone, boosting the range of a wireless connection, and removing junk programs that come with a new computer.

I am in the market for a new smart phone. Should I wait for the Apple iPhone? When will it be available and when will you review it?

Apple says the iPhone is on track to go on sale in “late June,” and I expect to be able to test it and publish a review around that time. There will also be many other reviews around then that you can consult.

I stand by my earlier advice, which is that people shopping for a smart phone, who can wait until then, and who could imagine shelling out $499–the iPhone’s base price–should wait to read the reviews of Apple’s first phone and take a look at it before making a decision. However, if you need a smart phone now, or can’t imagine spending that much, then you can ignore the hype and buy a BlackBerry, or a Treo, or another competitor.

Three other key factors could also make you reasonably ignore the iPhone. It will lack a physical keyboard, relying on virtual keys that appear on the screen, so if you prefer a real keyboard, the iPhone would be a nonstarter for you. Also, it will only work on the AT&T wireless network (formerly Cingular) in the U.S. So, if you prefer another wireless carrier, forget the iPhone. Finally, it will only operate on a relatively slow network technology, called EDGE, so if you want a smart phone that operates on the fastest cellular networks, the iPhone is the wrong choice, even though it will also include Wi-Fi wireless networking.

The wireless connection to my wife’s Windows XP computer keeps going down. The computer is about 75 feet (but through three walls) from my Dell Truemobile 2300 router. Should I assume I need a better, more powerful router? And, finally, will it also connect to my MacBook Pro laptop?

A more powerful router might help, but wireless reception varies greatly depending on home construction and layout. You might look for a new router that features a technology called MIMO, which I have found in my tests can improve both speed and range. Even with a new router, you might also have to move its location. There are also various boosters and repeaters that can be used, though some of these require more technical expertise to install than most folks have.

One good method for extending the range of a wireless connection is to buy a set of so-called powerline adapters. These carry your network signal over plain old electrical lines, and some models allow you to create a wireless network by plugging a wireless router into such an adapter in a distant room. I described these adapters in more detail in a column you can find at: ptech.allthingsd.com/20060817/powerline-adapters-access.

In my own home, I have used both MIMO routers, and powerline adapters, successfully with mixtures of Windows and Apple Macintosh computers, including the MacBook Pro, and various Dell, Lenovo and Hewlett-Packard laptops.

Can I remove the junk programs that came with my new computer–the ones you call “craplets”–by using the “Add or Remove Programs” control panel in Windows?

Yes, but that is a tedious manual process and may not get them all. Also, in Windows Vista, that control panel has been renamed and is now called “Programs and Features.”

Instead, I would suggest first downloading and running a free program specifically designed to eliminate craplets, the crippled trial programs and advertising come-ons that are now packed into so many new Windows PCs. This program is called “The PC Decrapifier” and can be found at pcdecrapifier.com. If this program misses a few of the junk items you want gone, you can then use the manual method.

* * *

Because of the volume of email I receive, I can’t routinely answer individual questions by email, or consult on individual problems or purchasing decisions. I read all questions I receive and select three each week to answer in the column.

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.

Lots of new technologies claim to be transformative, productivity-enhancing and liberating. But only a few really live up to those claims. One of them is Wi-Fi, the wireless networking technology that has truly revolutionized the way people use the Internet.

With Wi-Fi, you can get online in any room of a home or office — not just the room where your wired Internet connection lives. And you can use the Internet in airports, coffee shops, hotel lobbies and lots of other places where it wasn’t possible before.

But like a lot of technologies, Wi-Fi has been changing so fast that confusion has crept in. A new version of Wi-Fi, generally known as draft-N, promises greater speed, greater range and standardization, but may not deliver any of those things. I’ve been testing some of this latest Wi-Fi gear, with mixed results.

Linksys draft-N router

Also like some other technologies, Wi-Fi adheres to standards set by a private engineering organization called the IEEE (Institute of Electrical and Electronics Engineers), in which representatives of interested companies participate.

The current version of Wi-Fi blessed by the IEEE is called G and has a maximum speed of 54 megabits per second. This G version of Wi-Fi, known to techies as 802.11g, is built into most wireless routers (which transmit and receive Wi-Fi signals) and most laptops.

Now, the IEEE is working on a new, faster standard called N. It promises much greater speeds, measured in the hundreds of megabits per second, and much better range. But certifying this N standard is taking forever, partly because of factionalism within the IEEE.

In the meantime, the marketplace has moved on. Last year, major makers of Wi-Fi routers, like Linksys and Belkin, brought out routers that used a major advance, called MIMO, expected to be in the eventual N standard. This technology uses multiple antennas to send and combine multiple data streams into one faster, longer-range signal.

Last year, I endorsed one of these MIMO products, Belkin’s Pre-N router, which was the only Wi-Fi router I ever tested that covered every corner of my home at decent speeds, even when I used laptops with only the older G technology built in.

Now, the Wi-Fi market has moved again. The major makers have all brought out what they call draft-N routers and cards for laptops that adhere to a draft of the coming N standard that the IEEE has passed. It’s probable, but not certain, that the final N standard likely to emerge next year will comply with this draft. Similar draft-N gear will be built into new laptops later this year.

The makers are claiming that the draft-N routers will have up to 12 times the speed and four times the range of G equipment when used with compatible laptop cards. Even if you are just using a laptop with a G receiver built in, the new routers can also improve speed and range, though more modestly.

Speed is nice, but even current G maximum speeds far exceed the speed of most home DSL or cable modem connections. What’s more important to most consumers is range, or more accurately, decent speed at longer ranges. The biggest Wi-Fi problem people face is dead spots or very slow connections in parts of their homes.

I tested the new Belkin draft-N router, called the Belkin N1, in my house and compared it with the Belkin Pre-N router I bought last year and have used ever since. The new router, which I placed in exactly the same spot as the old one, was easy to set up. It has lovely, large icons on the front that tell you if everything on your network is connected and working.

But the N1 didn’t perform any better, and in some cases did worse, than the old Belkin. This was true whether I was testing it on a Windows laptop or a Mac laptop, and whether I was using the Belkin N1 laptop card or just the built-in G radios in my test laptops. The new model covered my whole house, but so did the old one.

I also tried the Linksys draft-N router, called the WRT300N, which has an antenna array that makes it look like a radar station or a submarine conning tower. The company had to help me set it up, because I use a very fast Internet service called Verizon FIOS, which the router’s program doesn’t recognize. The Linksys proved much slower than the Belkin, though this may be because of a mismatch between its settings and my Verizon service, which is used by only a few hundred thousand homes in the U.S.

My unimpressive draft-N experience is confirmed by several, more extensive tests done by some magazines and Web sites, which showed the draft-N gear to be no big deal.

There are two other problems with the draft-N systems. The manufacturers aren’t promising to upgrade them to the final N standard when it emerges. And buying them will get more complicated in the coming months, because they will be offered in a range of speeds and even in two different frequencies.

I can’t recommend the draft-N equipment over the previous round of MIMO-equipped routers. They will likely be better than your G equipment, but so were last year’s models.

• Email me at mossberg@wsj.com.

Corrections & Amplifications:

A new, faster standard for Wi-Fi wireless network connections promises speeds measured in the hundreds of megabits per second. This column incorrectly says the new speeds would be in the hundreds of megabytes per second.