M Mi and Sir Ne 21. Pipelining improves CPU performance by allowing multiple instructions to execute simultaneously in different stages of the fetch and execute cycle.. 22. A Halt statement is an example of a conditional Branch of a sequence control instruction. 23. Arithmetic shift operations preserve the sign bit, while the logical shift operations do not. 24. Primary storage devices support immediate execution of programs, while secondary storage devices provide long term storage of programs and data. 25. Magnetic secondary storage devices store data bits as variations of laser light reflection due to their magnetic orientation. 26. Important features of primary storage is the data access speed and the number of bits that can be read in a single operation.