NOT all trade fairs are thrown open to the public to show off consumer products. There is also the specialist exhibition. Business and Industrial (B & I) devotes its energy to organising specialist exhibitions for trade. The B & I Group was established in 1974 to specialise in the publishing business but, in 1980, expanded to organising trade fairs. B & I Trade Fairs Ltd can organise exhibitions ranging from technical products - computers, automatic identification and bar-code technology, manufacturing, moulds and dies - to consumer goods - watches and clocks and audio-visual equipment. It operates in Hong Kong, China, Malaysia, Singapore, South Korea, Indonesia and Vietnam. Most of the exhibitions the company organises are in Asia because Western countries and corporations are looking for trade opportunities in the Far East. The company's marketing director, Arthur Spurdle, said fewer exhibitors were from the United States and Europe because of economic problems there. However, many still showed in Asia because of its potential as a market for their industry. Entertainment was one example. Mr Spurdle said the B & I Trade Fair was extending its exhibition topic list as there was an increasing need to cover modern living and Western technologies in Asia. B & I planned to expand its fair organising further into Asia. ''We are looking at exhibitions in other major emerging markets as well, and the most interesting one in time is the Russian Federation, the potential market in the eastern Europe,'' Mr Spurdle said. Adsale Exhibition Services Ltd also found there was interest in specialised exhibitions. Each year it runs four fairs concurrently on investment and trade, money, franchising and real estate. Adsale, established in 1980, began by holding international exhibitions in the Asia-Pacific. It now specialises in Hong Kong, China and Vietnam. Investment and Trade '93 is the fourth international forum on investment and trade for the Asia-Pacific region. The exhibition covers a wide range, including land capitalisation, building infrastructure, economic zone development, business ventures and general trade and investment services. The eighth Hong Kong Money Show, Money '93, provides an opportunity for financial institutions engaging in banking services, unit trust/mutual funds, forex, stocks, shares, financial information and investment advisory services to promote their products and services. It is held in association with the Hong Kong Trade Fair Group. This year, Hong Kong will stage its first exhibition on franchising. Franchising '93 has won support from local and overseas franchise associations. The show will include auto products and services, beauty care, business aids and services, construction, food and others. Real Estate '93 provides a chance for real estate agents, land developers and project promoters worldwide to introduce their properties and projects to Hong Kong and Asian investors. Last year, these four concurrent fairs attracted 100 exhibitors from 18 countries and 12,000 visitors.