The first entry is abattoir (not abbatoir); the last is ZULU (a term used by Western military forces to mean GMT).

In between are 2,211 additional entries in the A-to-Z general style guide, part of the Reuters Handbook of Journalism, which we are now making available online. Also included in the handbook are sections on standards and values; a guide to operations; a sports style guide and a section of specialised guidance on such issues as personal investments by journalists, dealing with threats and complaints and reporting information found on the internet.

The handbook is the guidance Reuters journalists live by -- and we're proud of it. Until now, it hasn't been freely available to the public. In the early 1990s, a printed handbook was published and in 2006 the Reuters Foundation published a relatively short PDF online that gave some basic guidance to reporters. But it's only now that we're putting the full handbook online.

We've decided to make the handbook available to everyone for a number of reasons. Among them:

• Transparency: At a time when trust is an endangered commodity in the financial and media worlds, it's important that news consumers see the guidelines our journalists follow.
• Service: As we've seen over the past decade, the barriers to publishing have dropped so that anyone with an idea and a computer can be a publisher. But it's also become clear that publishers have a varying standard of truth, fairness and style. Our handbook is a good place for budding journalists to begin.
• Geography: Reuters serves a global audience and the handbook recognises the cultural and political differences that our journalists face in reporting for the world. This is a handbook not just for English-language journalists in the United Kingdom or the United States, but for wherever English is used.

Many entries deal with words that are sometimes confused or misused. Turning randomly to the "H" section, we learn the difference between hyperthermia and hypothermia (The latter means "Too cold. Think that o rhymes with low" while the former means "Too hot. Think of 'er' as in very."); Haarlem and Harlem (the latter is in New York City, the former in the Netherlands); hangar and hanger (the latter is for clothes, the former a shelter for aircraft); and hale and hail (the former means "free from disease, or to pull or haul by force." The latter "is to salute or call out, or an ice shower").

We take a global approach to the spelling of many words. Often, it's the United States against the world. For instance, our preferred style is "artefact," except in the U.S., where it's artifact. Same goes for axe and axeing -- our standards for most of the world -- which become ax and axing in the U.S. There's also "backwards," which loses its "s" in American stories, and "leukaemia," which loses that first "a" in the U.S. There's plenty more: tyre and tire, titbit and tidbit, and defence and defense.

In the world of diplomacy, economics and academe, the G3 is Germany, Japan and the U.S.; the G5 extends membership to France and the U.K.; G7 grows the club to Canada and Italy; make it G8 with Russia; G10 adds Belgium, the Netherlands and Sweden. As for the G24, G30 and G77, you'll have to look for yourself (we've got entries for them, too).

There are slang words to avoid (posh -- though one former Spice Girl might object) and a number of common misspellings (Viet Cong, not Vietcong; ventricle, not ventrical; machinegun, not machine gun; and ketchup, not catchup or catsup).

The sports section of the handbook offers a list of sports cliches to avoid (hard fought, made history, veteran, bounce back, and icon), the difference between a field and a pitch (the former's where American football and baseball are played), and an explanation of delight as a transitive verb that needs an object ("Marat Safin delighted Russian fans with a neat chip...not Marat Safin delighted with a chip."). Words like disaster and tragedy shouldn't be used in sports stories, as this devalues the significance of these words ("Losing a football match is not a disaster. A stand falling down and crushing a fan is").

When language implies a value judgment, we must use words very carefully (cult, for instance: One person's cult is another's religion). The entry for "good, bad" advises: "For financial and commodity markets good news and bad news depends on who you are and what your position is in the market. Avoid them."

One of the most controversial entries is that of "terrorism." The entry reads, in part:

"We may refer without attribution to terrorism and counter-terrorism in general but do not refer to specific events as terrorism. Nor do we use the adjective word terrorist without attribution to qualify specific individuals, groups or events. ... Report the subjects of news stories objectively, their actions, identity and background. Aim for a dispassionate use of language so that individuals, organisations and governments can make their own judgment on the basis of facts. Seek to use more specific terms like “bomber” or “bombing”, “hijacker” or “hijacking”, “attacker” or “attacks”, “gunman” or “gunmen” etc."

This policy has been passionately debated inside and outside Reuters. As  the handbook says, "we aim for dispassionate language" so that our customers can "make their own judgment on the basis of facts."

Reuters Editor-in-Chief David Schlesinger puts it this way:

"Over the years we have been criticised for this policy on numerous occasions, when people or governments wanted us to label an incident ourselves rather than quote their views. Criticism of our policy was especially fierce when the United States was attacked on Sept. 11, 2001. Reuters made the decision not to describe the attackers as terrorists, because we thought a label would not add to our vivid description of the thousands of deaths and the destruction of the iconic twin towers of the World Trade Center. In the years since, as the world has witnessed numerous other attacks, we've chosen to continue that policy of sticking with the facts and letting our readers make up their own minds based on our reporting and the evidence we present them."

It's important to point out that the handbook is a living document, one that preserves rules that have guided Reuters journalists through a century and half but also one that may change when the times change.  It's also important to note that the handbook is produced by humans who aren't infallible -- and it's used by humans who aren't infallible, so sometimes we make mistakes. I'm sure you'll let us know when we do, but we're usually harder on ourselves than anyone else is.

I hope you'll find the handbook useful, whether you're a journalist, a student, a teacher or an engaged reader. And we welcome your comments and suggestions.

The recent election in Iran was one of the more dramatic stories this year, with powerful images of protests and street-fighting dominating television and online coverage.

Because traditional news organizations were essentially shut down by the authorities, it fell to citizen journalists -- many of whom were among the protesters -- to provide the images that the world would see, using such social media as Twitter, Facebook and YouTube.

This has raised a number of ethics, standards and legal questions for mainstream journalists. My colleague John Clarke, Reuters Global Television Editor, found himself in the middle of the issue as images became available and clients demanded coverage of the election's aftermath. John discusses the issues raised, the lessons learned and the opportunities for the future below. As always, his opinions are his own.

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Protests following the controversial Iranian election have put citizen journalism even more firmly in the spotlight. With traditional news gathering organizations effectively shut down by authorities, text, video and stills being produced and posted on social websites by the protesters themselves became the main way that much information was getting out of the country. This dramatic coverage -- regardless of (and perhaps even enhanced by) its shaky nature -- was accessed by Reuters (and other news organizations) and distributed to clients and viewers around the world.

Citizen journalism isn't new. We have long accessed amateur footage of stories around the world, from plane crashes to wars to natural disasters. However, the internet and mobile devices have resulted in a dramatic increase in the amount of content available and the speed of delivery, the ability to deliver outside of normal controls, more uncertainty over origin, ownership and verification, and the viral nature in which it can all spread around the globe.

At Reuters, we have used video from social networking websites for several years. We put in place strict rules about how such material can be accessed and used, with only senior editors authorized to approve running this material.

Verification is a major issue. Video or photos might not be what they purport to be, either because of sloppy information from the person posting it, or deliberate deceit, either to create mischief or for political or other reasons.

Another important consideration is that copyright still applies to the internet. The person posting material might hold copyright, or worse, they might not hold copyright. The material could originate from a private individual, a company or another news organization. Wherever possible, we have sought to find and seek permission from the originator of the material, as we would do for any third-party material accessed in any other way. This can apply to hard news and lighter material, including funny visual postings that have gone viral and have become stories in their own right.

When the Iran story broke, even when we were able to operate, we still accessed internet-posted amateur video. But such footage became even more important when our operations were hampered by authorities –- the sheer number of mini-cams and mobile phones taking visual images meant there would be good material we would want, even if we were able to operate freely ourselves.

Early on, we set up a 24-hour monitoring of Twitter and various social networking sites. We made a call early on that we would relax our rules on clearance –- protesters posting video and pictures on social networks wanted to get them to the world, and we were another conduit for that. Other news organizations followed a similar rationale.

Throughout the Iran story, however, we were extremely careful about what we wrote and said about material accessed from social networking sites, certainly not taking at face value what (little) information usually comes with such posts.

We have been clear when we are unable to verify content or location or date, and have also clearly stated that we’ve accessed it from a social networking site. Our subscribers (and their viewers) are also intelligent enough to know that no-one can 100 percent verify this type of material and are similarly circumspect, and the shaky, low-resolution quality of much of this material is an immediate signal to clients and viewers that it was shot by an amateur.

This approach does not, of course, absolve us of all responsibility. There have been many videos and photos we haven’t used because they have not rung true for one reason or another.

Iran was also a special case in that citizen journalism was not only a way to get video and photographs, but it was a very important part of the story itself. We didn’t just get video from citizen journalists, we did several stories, like the one below, about the importance of citizen journalism in Iran, which put our use of it in its proper context, too.

Iran was in many respects the culmination of trends in the way citizens have been using the web for the past few years –- a confluence of the proliferation of mobile recording devices, internet delivery and social networking sites that allow almost instantaneous interactions between users and an exchange of information and ideas.

How social networking intersects with traditional news organizations is also an evolutionary process.

It will not be good enough for traditional news companies to simply take from citizen journalists –- it needs to be a two-way exchange of content, information and ideas, with mainstream news companies contributing via blogs, chatrooms and other social networking sites, whether in the general news area or in specialist forums such as those for the financial community.

Verification, copyright and quality will always be significant issues -- even more so as millions of people around the world have the ability to distribute and exchange content. The combination of citizen journalism, and the standards of news organizations of companies such as Reuters, has the ability to produce a richer flow of information around the world.

Provided we clearly flag the origin of material and put the relevant context around it, our subscribers, our viewers and our readers –- who are already immersed in social networking as consumers and contributors themselves –- are smart enough to evaluate this content, without challenging our core journalistic values.

-- John Clarke, Global Editor, Television