I use raspbian for embedded systems like microcontrollers, I make several sensors and display them on an LCD, does the Rasbian operating system also have a real time operating system?
Raspbian is a distribution for Raspberry Pi built on top of Debian Linux, which is a general purpose operating system, as opposed to a real-time operating system. There are ways to run a RTOS on RPi, but it is rather waste of a powerful board like RPi. A more suitable way to achieve real-time behaviour would be to use the PREEMPT_RT patch for the Linux kernel.