• Parallel architectures and shared-memory interconnects converged toward scalable HPC, emphasizing shuffle-exchange networks, parallel memories, and reconfigurable processor arrays to balance latency, bandwidth, and locality [4], [8], [9], [18], [20].

• Reliability and conformance in concurrent hardware/software systems driven early work on deadlock analysis, prevention, and algorithmic testing of logic circuits, highlighting formal methods and systematic design for correctness [1], [3], [10], [16], [17].

• High-performance hardware design pursued extreme speed through VLSI area-time tradeoffs, multiprocessor ARPA systems, and specialized processors, framing design choices around latency, throughput, and silicon area [2], [12], [14], [15], [20].

• Coding theory and communications research integrated error control, channel coding, and signal propagation into computer engineering, addressing erasure channels and convolutional codes for reliability and performance [6], [7], [11].

• RF/microwave hardware research emphasized transmission-line behavior and antenna design, underpinning signal integrity and wireless-like links in early computer engineering, including transmission lines and linearly polarized microstrip antennas [11], [14].