Microprogramming: History and Evolution - Edwardbosworth.com

VHDL
The VHDL was proposed in the late 1980’s (IEEE Standard 1076–1987) and refined in
the 1990’s (IEEE Standards 1164 and 1076–1993). The term VHDL stands for
VHSIC (Very High Speed Integrated Circuits) Hardware Description Language.
Here is the VHDL description of a two–input AND gate.
entity AND2 is
port (in1, in2: in std_logic;
out1: out std_logic);
end AND2;
architecture behavioral_2 of AND2 is
begin
end behavioral_2;
out1