CPU is always wondering "what to do next", runs program Input devices: keyboard, mouse, touch screen output devices: screen, speakers, dvd burner main memory:fast geçici, reboot da gider RAM secondary memory: yavaş büyük, silinene kadar, disk drive, memory stick Yazılan kodlar main memorye eklenir, CPU çalıştıracağı zaman oradan çeker Linux'da python kodu çalıştırmak için: python hello.py Değişken:Represent a named location in computer memory the programmer uses to store various values to keep track of for use later. Variables can then be retrieved and acted on at any time using the assigned variable "name." value has a memory address, a variable contains memory address, a variable refers to a value and points a value değişkenleri adlandırırken harf ya da _ kullan, sayı kullanma Case sensitive İşlem sırası: Parenthesis Exponents / Roots Multiplication / Division Addition / Subtraction Left to right // işareti sayıları inte