notes

Microsoft DOS
it was a "Disk Operating System"
it used a command prompt instead of GUI
cmd

command prompt

A, B were floppy disks
C was typically hard drive

backslash is the root folder

commands:
tree
c:
dir
dir *.xlsx
cd
cd josh
cd .
cd ..
md
mkdir

BATCH file

three letter palindrome
<([A-Za-z])[A-Za-z]\1>

101
1010
10100

bitshift

VB programming
variable
has name, address, value, data type
declare a variable
Dim TaxRate As Double
double is the data type
7.45 is a double

7 is an integer
"hello there" is a string

Private Sub CommandButton1_Click()
    Dim TaxRate As Double
End Sub