This definition of ICT is from Robert Toomeys' Schooling Issues Digest.

The acronym ICT is taken to stand for information and communication technology or alternatively information and communications technology. The differing number of the word “communication” is significant in that the singular form is concerned with human interaction while the plural is generally taken to refer to the whole field of data communications infrastructure. At its simplest, the former or singular form is the process or outcome while the latter or plural is about the technology itself. The acronym ICT can also take a plural form (technologies) where it is understood to entail the specific devices or processes which collectively make up the “Technology.” This pluralised form (particularly in Queensland) is sometimes written as ICTs. The term ICT must be seen as an evolution from the antecedent and more narrowly defined term IT (information technology) which maintains its usage in government, business, industry and in relation to tertiary and other academic courses dealing with such areas as programming, database design and expert systems. In the United States, synonymous terms such as “technology” and “educational technology” are used. A useful definition of ICT is that it: … generally relates to those technologies that are used for accessing, gathering, manipulating and presenting or communicating information. The technologies could include hardware (e.g. computers and other devices); software applications; and connectivity (e.g. access to the Internet, local networking infrastructure, videoconferencing). What is most significant about ICT is the increasing convergence of computer-based, multimedia and communications technologies and the rapid rate of change that characterises both the technologies and their use.