TTL logic is 60 years old

Transistor–transistor logic (TTL) is 60 years old this year based on the following article (Wikipedia claims this happened already in 2023). TTL became the foundation of computers and other digital electronics. TTL integrated circuits (ICs) were widely used in applications such as computers, industrial controls, test equipment and instrumentation, consumer electronics, and synthesizers. The 7400 series by Texas Instruments introduced in 1966 became particularly popular. Over the decades, many generations of pin-compatible descendant families evolved. Even after Very-Large-Scale Integration (VLSI) CMOS integrated circuit microprocessors made multiple-chip processors obsolete, TTL devices still found extensive use as glue logic interfacing between more densely integrated components.

Fifty years of TTL
https://www.embedded.com/fifty-years-of-ttl/

Alert reader Caron Williams notified me that 2014 marks the 50th anniversary of TTL (transistor-transistor logic) . Wikipedia says that although TTL was invented in 1961, TI released the 5400 family of IC’s in 1964, and that the 7400 series in plastic came out two years later. Since TTL is practically synonymous with the 5400 and 7400 series, why not offer 50th birthday congratulations?

Remember that the IC was invented just a few years before TTL came out. Other kinds of logic were commonly used, like DTL (diode-transistor logic) and RTL (resistor-transistor logic).