Computers….and…more

A programmable device

Carries out specific tasks

Arithmetic & mathematicoperations

Sequences of processes

• Electronic devices• Input peripherals• Output • Mixed peripherals• Storage • Memories• Central Processing Unit or

CPU• Executes a series of

instructions• Integrated circuits

Is a set of programs that serve as intermediary between the user and the hardware

OS

ProgramsApplications

Resources

Interfaces

Connection with equipment

TYPES OF OSSINGLE TASK

MULTI USER

MULTI TASK

SINGLE USER

ConvenientEfficient

OrganizedIn constant evolution

VersitileChangingAdaptable

Facilitates communication

Sharing files, information…

Share computer resources

Programming

NETWORKS

Scale: WAN, LAN, PAN, CAN, BN (backbone), VPN (virtual private)…

Connection:home PNA, Ethernet, line…

Services: pubic or private

Topology: tree, ring, star, bus….

Protocol: net & protocol…