This text presents a comprehensive treatment of signal processing and linear systems suitable for undergraduate students in electrical engineering‎,‎ it is based on lathi‎'‎s widely used book‎,‎ linear systems and signals‎,‎ with additional applications to communications‎,‎ controls‎,‎ and filtering as well as new chapters on analog and digital filters and digital signal processing‎.‎This volume‎'‎s organization is different from the earlier book‎.‎ Here‎,‎ the laplace transform follows fourier‎,‎ rather than the reverse‎;‎ continuous‎-time and discrete‎-time systems are treated sequentially‎,‎ rather than interwoven‎.‎ Additionally‎,‎ the text contains enough material in discrete‎-time systems to be used not only for a traditional course in signals and systems but also for an introductory course in digital signal processing‎.‎ In signal processing and linear systems lathi emphasizes the physical appreciation of concepts rather than the mere mathematical manipulation of symbols‎.‎ Avoiding the tendency to treat engineering as a branch of applied mathematics‎,‎ he uses mathematics not so much to prove an axiomatic theory as to enhance physical and intuitive understanding of concepts‎.‎ Wherever possible‎,‎ theoretical results are supported by carefully chosen examples and analogies‎,‎ allowing students to intuitively discover meaning for themselves‎.‎