<u><em>Differences between barcode reader and character recognition devices:</em></u>
Barcode Reader or Barcode Scanner:  
- Barcode Scanner scans the data by brightening the barcodes usingSensor 
- The analog signal  is then converted into digital signal by Converter. 
- The Decoder calculates the converted data and sends valid data to the computer.  
Character Recognition Devices (OCR):
- OCR scans the physical document and converts them into two-coloured format.
- The darker and lighter area are identified as characters and blanks respectively. 
- The common methods used are: Pattern Recognition and Feature Detection.
 
        
                    
             
        
        
        
Answer:
#include <bits/stdc++.h>
using namespace std;
bool isPalindrome(string str)
{
    char a,b;
int length = str.length();
for (int i = 0; i < length / 2; i++)
{
    a=tolower(str[i]);//Converting both first characters to lowercase..
    b=tolower(str[length-1-i]);
    if (b != a )
return false;
}
return true;
    
}
int main() {
    string t1;
    cin>>t1;
    if(isPalindrome(t1))
    cout<<"The string is Palindrome"<<endl;
    else
    cout<<"The string is not Palindrome"<<endl;
 return 0;
}
Output:-
Enter the string
madam
The string is Palindrome
Enter the string
abba
The string is Palindrome
Enter the string
22
The string is Palindrome
Enter the string
67876
The string is Palindrome
Enter the string
444244
The string is not Palindrome
Explanation:
To ignore the cases of uppercase and lower case i have converted every character to lowercase then checking each character.You can convert to uppercase also that will also work.
 
        
             
        
        
        
The answer is Cloud Computing.  It access calendars, contact information, email, files and folders, instant messaging, presentations, and task lists over the internet. This means, if you have a device and an internet connection, you can have your "office" anywhere, anytime.
        
                    
             
        
        
        
Answer:
Translation : Distributed Databases 
Explanation:
 
        
             
        
        
        
Answer is power and base
Explanation: both power and base are number variables