Business Hours -- Offices are usually open weekdays from 9am to 5pm. Banks are open weekdays from 9am to 3pm or later and sometimes Saturday mornings. Stores typically open between 9 and 10am and close between 5 and 6pm Monday through Saturday. Stores in shopping complexes or malls tend to stay open late: until about 9pm on weekdays and weekends. Many malls and larger department stores are open on Sunday.

Drinking Laws -- The legal age for purchase and consumption of alcoholic beverages is 21; proof of age is required and often requested at bars, nightclubs, and restaurants, so it's always a good idea to bring ID when you go out. Beer and wine often can be purchased in supermarkets, but liquor laws vary from state to state. A county or city which prohibits the sale of alcohol is called "dry."

Do not carry open containers of alcohol in your car or any public area that isn't zoned for alcohol consumption. The police can fine you on the spot. And nothing will ruin your trip faster than getting a citation for DUI ("driving under the influence"), so don't even think about driving while intoxicated.

Electricity -- Like Canada, the United States uses 110-120 volts AC (60 cycles), compared to 220-240 volts AC (50 cycles) in most of Europe, Australia, and New Zealand. If your small appliances use 220-240 volts, you'll need a 110-volt transformer and a plug adapter with two flat parallel pins to operate them here. Downward converters that change 220-240 volts to 110-120 volts are difficult to find in the United States, so bring one with you.

Embassies & Consulates -- All embassies are located in the nation's capital, Washington, D.C. Some consulates are located in major U.S. cities, and most nations have a mission to the United Nations in New York City. If your country isn't listed below, call for directory information in Washington, D.C. (tel. 202/555-1212), or log on to www.embassy.org/embassies.

The embassy of Australia is at 1601 Massachusetts Ave. NW, Washington, DC 20036 (tel. 202/797-3000; www.austemb.org). There are consulates in New York, Honolulu, Houston, Los Angeles, and San Francisco.

The embassy of Canada is at 501 Pennsylvania Ave. NW, Washington, DC 20001 (tel. 202/682-1740; www.canadianembassy.org). Other Canadian consulates are in Buffalo (NY), Detroit, Los Angeles, New York, and Seattle.

The embassy of Ireland is at 2234 Massachusetts Ave. NW, Washington, DC 20008 (tel. 202/462-3939; www.irelandemb.org). Irish consulates are in Boston, Chicago, New York, San Francisco, and other cities. See website for complete listing.

The embassy of Japan is at 2520 Massachusetts Ave. NW, Washington, DC 20008 (tel. 202/238-6700; www.embjapan.org). Japanese consulates are located in many cities, including Atlanta, Boston, Detroit, New York, San Francisco, and Seattle.

The embassy of New Zealand is at 37 Observatory Circle NW, Washington, DC 20008 (tel. 202/328-4800; www.nzemb.org). New Zealand consulates are in Los Angeles, Salt Lake City, San Francisco, and Seattle.

The embassy of the United Kingdom is at 3100 Massachusetts Ave. NW, Washington, DC 20008 (tel. 202/588-7800; www.britainusa.com). Other British consulates are in Atlanta, Boston, Chicago, Cleveland, Houston, Los Angeles, New York, San Francisco, and Seattle.

Emergencies -- Call tel. 911 to report a fire, call the police, or get an ambulance anywhere in the United States. This is a toll-free call.

If you encounter serious problems, contact Traveler's Aid International (tel. 202/546-1127; www.travelersaid.org). This nationwide, nonprofit, social-service organization geared to helping travelers in difficult straits offers services that might include reuniting families separated while traveling, providing food and/or shelter to people stranded without cash, or even emotional counseling. If you're in trouble, seek them out.

Gasoline (Petrol) -- Petrol is known as gasoline (or simply "gas") in the United States, and petrol stations are known as both gas stations and service stations. At press time, in the U.S., the cost of gasoline is at an all-time high (for this country). British, European, and Australian visitors will still find it less expensive than at home. Taxes are already included in the printed price. One U.S. gallon equals 3.8 liters or .85 imperial gallons.

Holidays -- Banks, government offices, post offices, and many stores, restaurants, and museums are closed on the following legal national holidays: January 1 (New Year's Day), the third Monday in January (Martin Luther King, Jr., Day), the third Monday in February (Presidents' Day, Washington's Birthday), the last Monday in May (Memorial Day), July 4 (Independence Day), the first Monday in September (Labor Day), the second Monday in October (Columbus Day), November 11 (Veterans Day/Armistice Day), the fourth Thursday in November (Thanksgiving Day), and December 25 (Christmas).

Legal Aid -- If you are "pulled over" for a minor infraction (such as speeding), never attempt to pay the fine directly to a police officer; this could be construed as attempted bribery, a much more serious crime. Pay fines by mail, or directly into the hands of the clerk of the court. If accused of a more serious offense, say and do nothing before consulting a lawyer. Here the burden is on the state to prove a person's guilt beyond a reasonable doubt, and everyone has the right to remain silent, whether he or she is suspected of a crime or actually arrested. Once arrested, a person can make one telephone call to a party of his or her choice. International visitors should call their embassy or consulate.

Mail -- Generally found at intersections, mailboxes are blue with a red-and-white stripe and carry the inscription U.S. MAIL.

At press time, domestic postage rates were 27¢ for a postcard and 42¢ for a letter. For international mail, a first-class letter of up to 1 ounce costs 94¢ (72¢ to Canada and Mexico); a first-class postcard costs the same as a letter. For more information, go to www.usps.com and click on "Calculate Postage."

If you aren't sure what your address will be in the United States, mail can be sent to you, in your name, c/o General Delivery at the main post office of the city or region where you expect to be. (Call tel. 800/275-8777 for information on the nearest post office.) The addressee must pick up mail in person and must produce proof of identity (driver's license, passport, or similar document). Most post offices will hold your mail for up to 1 month, and are open Monday to Friday from 8am to 6pm and Saturday from 9am to 3pm.

Always include zip codes when mailing items in the U.S. If you don't know your zip code, visit www.usps.com/zip4.

Taxes -- The United States has no value-added tax (VAT) or other indirect tax at the national level. Every state, county, and city has the right to levy its own local tax on all purchases, including hotel and restaurant checks, airline tickets, and so on. These taxes will not appear on price tags.

Telephones -- Many convenience stores, drugstores, and newsstands sell prepaid calling cards in denominations up to $50; for international visitors, these can be the least expensive way to call home. Many public pay phones at airports now accept American Express, MasterCard, and Visa credit cards. Local calls made from pay phones in most locales cost either 25¢ or 35¢ (no pennies, please). Most long-distance and international calls can be dialed directly from any phone. For calls within the United States and to Canada, dial 1 followed by the area code and the seven-digit number. For other international calls, dial 011 followed by the country code, city code, and the number you are calling.

If you're not from the U.S., you may be stymied by the limitations of our GSM (Global System for Mobile Communications) wireless network. Your phone will probably work in most major U.S. cities; it definitely won't work in many rural areas. To see where GSM phones work in the U.S., check out www.t-mobile.com/coverage. And you may or may not be able to send SMS (text messages). Check with your home provider to see if you need a different SIM chip or setting before coming to North America. And if your phone doesn't work here, consider buying a cheap pay-as-you-go phone.

Calls to area codes 800, 888, 877, and 866 are toll-free. However, calls to area codes 700 and 900 (chat lines, bulletin boards, "dating" services, and so on) can be very expensive -- usually a charge of 95¢ to $3 or more per minute, and they sometimes have minimum charges that can run as high as $15 or more.

For reversed-charge or collect calls, and for person-to-person calls, dial the number 0, then the area code and number; an operator will come on the line, and you should specify whether you are calling collect, person-to-person, or both. If your operator-assisted call is international, ask for the overseas operator.

For local directory assistance ("information"), dial 411; for long-distance information, dial 1, then the appropriate area code and 555-1212.

Telegraph, Telex & Fax -- Telegraph and telex services are provided primarily by Western Union (tel. 800/325-6000; www.westernunion.com). You can telegraph (wire) money, or have it telegraphed to you, very quickly over the Western Union system, but this service can cost as much as 15% to 20% of the amount sent. You can't send an actual "telegram" message anymore.

Most hotels have fax machines available for guest use (be sure to ask about the charge to use it). Many hotel rooms are wired for guests' fax machines. A less expensive way to send and receive faxes may be at stores such as the UPS Store or FedEx/Kinko's.

Time -- The continental United States is divided into four time zones: Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), and Pacific Standard Time (PST). Alaska and Hawaii have their own zones. For example, when it's 9am in Los Angeles (PST), it's 7am in Honolulu (HST),10am in Denver (MST), 11am in Chicago (CST), noon in New York City (EST), 5pm in London (GMT), and 2am the next day in Sydney.

Daylight saving time takes effect at 2am the second Sunday in March until 2am the first Sunday in November, except in Arizona, Hawaii, the U.S. Virgin Islands, and Puerto Rico. Daylight saving moves the clock 1 hour ahead of standard time.

Tipping -- Tips are a very important part of certain workers' income, and gratuities are the standard way of showing appreciation for services provided. (Tipping is certainly not compulsory if the service is poor!) In hotels, tip bellhops at least $1 per bag ($2-$3 if you have a lot of luggage) and tip the chamber staff $1 to $2 per day (more if you've left a disaster area for him or her to clean up).

Tip the doorman or concierge only if he or she has provided you with some specific service (for example, calling a cab for you or obtaining difficult-to-get theater tickets). Tip the valet-parking attendant $1 every time you get your car.

In restaurants, bars, and nightclubs, tip service staff 15% to 20% of the check, tip bartenders 10% to 15%, tip checkroom attendants $1 per garment, and tip valet-parking attendants $1 per vehicle.

As for other service personnel, tip cabdrivers 15% of the fare; tip skycaps at airports at least $1 per bag ($2-$3 if you have a lot of luggage); and tip hairdressers and barbers 15% to 20%.

Toilets -- You won't find public toilets, or "restrooms," on the streets in most U.S. cities, but they can be found in hotel lobbies, bars, restaurants, museums, department stores, railway and bus stations, and service stations. Large hotels and fast-food restaurants are often the best bet for clean facilities. Restaurants and bars in resorts or heavily visited areas may reserve their restrooms for patrons.

Useful Phone Numbers -- U.S. Department of State Travel Advisory -- tel. 202/647-5225 (staffed 24 hr.)

U.S. Passport Agency -- tel. 202/647-0518

U.S. Centers for Disease Control International Traveler's Hotline -- tel. 404/332-4559

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.