They are wrong. Year 2000 problems span the entire business, from the factory floor to the executive washroom and from the supply chain to product liability. For most companies, resolving their year 2000 issues will either be the largest project they have ever undertaken, or the last. It is true that year 2000 affects data processing systems, many of which will be older mainframe systems, but this is only the start of the problem. Newer client-server systems are likely to fail.
Spreadsheets are likely to fail.
Desktop systems of all sorts will need to be checked if they are important to the business and if they are sensitive, in any way at all, to the calendar. But it is the hidden computer systems that represent the greatest problems in most organisations. In thirty years, microprocessors have penetrated most areas of business life. There are stock control systems, automated assembly lines, lift controllers, time locks, alarms, instruments, credit card readers and security systems. All these and more need to be checked.