Full Form of PCB:
Process Control Block
PCB Full Form is Process Control Block. The Process Control Block (also termed Task Controlling Block, process table, Task Structure, or Switch frame) is a data organization in the functioning system kernel comprising the data required to handle a specific method. The PCB is the display of a method in a functioning system. The function of the PCBs is vital in process management that they are read and/or altered by nearly all OS functions, comprising those with scheduling, memory and I/O resource access and operation observing. The set of the PCBs perhaps delineates the present condition of the operating system.
Data configuring for processes is frequently done according to the PCBs. Thus indicators to other PCBs within a PCB permit the formation of those columns of methods in numerous preparation states like “ready”, “blocked”, etc. that were hitherto cited. In modern high-level multitasking techniques, the PCB saves various diverse elements of data, all required for precise and competent procedure organization. As PCB comprises the significant data of memory shielded from ordinary user access. For some operating systems, the most suitable and secure location of the PCB is in the front of the kernel stack of processes.
The PCB is a definite depository that permits the operating systems to trace vital data about a method. So the PCB is the data structure that outlines a method to the operating systems. It saves the data which describes the position of a process when it is deferred, permitting the OS to restart it later and execute it properly. PCB comprises the CPU general process registers, the CPU process word status.
PCB Full Form: Printed Circuit Board
Full Form of PCB refers to Printed Circuit Board. A PCB is a metallic plate in which electronic circuit pattern can be drawn and various electric components can be placed and connected. These boards are created by embedding copper tracks in plastic. Usually, the plastic is glass reinforced. Miniature holes are drilled in the board to allow the components to be fixed firmly. The copper tracks form a circuit by linking the components together. There are three kinds of printed circuit boards:
Single Sided Boards:
- In a single sided PCB, all the components are on one side of the substrate.
- This is usually used when the number of components is
Double Sided Board:
- Double sided PCBs are created by drilling holes at suitable places on the board.
- Next, the holes are layered with a conducting element.
- This allows the electric connections to take place between the circuit boards that are on each side.
- Manufacturing a multi-layer board needs a lot of attention to detail, as there are various layers that need to be registered accurately to the holes that are drilled.
- Every PCB panel is pressed as a layer with up to 10 layers which is then separated by steel plates.
- Next, these layers of 10 are sent to a hydraulic press.
As electronic and computing devices diminish in size, the same happens to the circuit boards. Hence, the boards become more packed, with greater processing powers. Also, the materials used in the printed circuit boards are changing, with more preference given to plastic boards that are considerably light-weight.