Understanding Hard Drives, DVDs, and Other Storage Devices
Disclaimer: This document is based on the MME Item 4 McGraw-Hill book, formatted for easier conversion to JAR format and use on mobile devices.
Mass Storage Devices
Modern computers typically include a hard disk drive (HDD) and a DVD rewritable drive. Floppy drives are becoming obsolete. Many computers now feature card readers for connecting portable storage devices like CompactFlash, SmartMedia, and Secure Digital cards.
Hard Disk Drives (HDD)
HDDs store a computer’s critical information. They are
Read MoreMachinery and Equipment Essentials
Machinery and Equipment
We live surrounded by machines and equipment: vehicles, watches, televisions, computers, washing machines, mobile phones, etc. From simple tools, like an opener, to more complex systems, like an industrial robot. Machines can be recognized by traits that distinguish them:
- Work with energy input: Machines and equipment require power supplies to function, either by connecting to a power source, battery, burning fuel, using air-operated pressure, or muscular effort.
- Transmit and
Green IT and Cloud Computing Essentials
Green IT Overview
(Green Computing/Technologies) refers to efficient computing resource use to minimize environmental impact, maximize economic viability, and ensure social duties. It identifies major energy consumers, environmental waste producers, promotes ecological software development, and computer recycling. Some technologies are classified as green for reducing energy consumption or CO2 emissions.
It is based on identifying technologies and energy-producing waste in computer product manufacturing,
Read MoreSemiconductors, Diodes, Transistors, and Magnetic Properties
Semiconductors
Semiconductors are neither conductors nor insulators. At room temperature, they are poor conductors but can conduct electricity with external power. Examples include silicon and germanium.
Doping
To improve conductivity, semiconductors undergo a process called doping. There are two types:
- P-Type: Dopants create “holes” where electrons are missing. Examples: Aluminum, boron, and gallium.
- N-Type: Dopants add extra electrons.
PN Junction and Polarization
A PN junction is formed by joining a
Read MoreCine.vd and Service.vd Code Explanation
app_code
cine.vd
Imports Microsoft.VisualBasic
Public Class Cine
Private xId As Integer
Private xDescripcion As String
Private xHoraInicio As Integer
Private xHoraFin As Integer
Private xNroSala As Integer
Private xCantAsistentes As Integer
Private xTotalAsientos As Integer
Private xPrecioEntrada As Decimal
Public Sub New()
xId = 0
xDescripcion = “”
xHoraInicio = 0
xHoraFin = 0
xNroSala = 0
xCantAsistentes = 0
xTotalAsientos = 0
xPrecioEntrada = 0
End Sub
Public Property Id() As Integer
Get
Return xId
End Get
Set(ByVal value
Computer Peripherals, Interfaces, and Technologies
1. Definition and Types of Peripherals
Peripherals are devices through which a computer communicates with the outside world. They also serve as storage systems, acting as auxiliary memory. Peripherals facilitate input/output (I/O) operations, complementing the CPU’s processing. They are classified into five main categories:
- Input Peripherals: Capture and send data to the computer for processing.
- Output Peripherals: Display or project information from the computer. These devices convert electrical impulses