Business management analysis or business consultancy; business management; marketing research or analysis; providing information concerning commercial sales; office functions, namely, filing, in particular documents or magnetic tapes; compilation of information into computer databases; Providing business assistance to others in the operation of data processing apparatus, namely, computers, typewriters, telex machines and other similar office machines; rental of typewriters, copying machines and word processors; providing commercial information and advice for consumers in the choice of goods and services; retail services or wholesale services for electrical machinery and apparatuses; retail services or wholesale services for photographic machines and apparatus and photographic supplies; database retrieval by network for others; consulting on business management for obtaining certification of international standards, or providing information thereon

Repair or maintenance of office machines and equipment; repair or maintenance of electronic machines and apparatus; repair or maintenance of telecommunication machines and apparatus (other than telephone apparatus, radio receivers and television receivers)

Designing of machines, apparatus, instruments (including their parts) or systems composed of such machines, apparatus and instruments; computer software design, computer programming, or maintenance of computer software; technological advice relating to computers, automobiles and industrial machines; rental of computers; rental of image scanners; providing computer programs on data networks; computer design; introduction and configuration of computer programs for others; consultancy relating to the design and creation of computer programs; communication network system design and planning mainly for building an in-house network linked with an external network; rental of access time to computer database; encryption of identity verification in network data communication; issuance of digital certificates for digital signatures to prove the creation date and time and non-tampering of a document or data digitized in communication by a computer terminal, by the encryption method of program