<s>
Altera	B-Language
Hardware	I-Language
Description	I-Language
Language	I-Language
(	O
AHDL	O
)	O
is	O
a	O
proprietary	O
hardware	O
description	O
language	O
(	O
HDL	O
)	O
developed	O
by	O
Altera	O
Corporation	O
.	O
</s>
<s>
AHDL	O
is	O
used	O
for	O
digital	O
logic	O
design	O
entry	O
for	O
Altera	O
's	O
complex	B-General_Concept
programmable	I-General_Concept
logic	I-General_Concept
devices	I-General_Concept
(	O
CPLDs	B-General_Concept
)	O
and	O
field-programmable	B-Architecture
gate	I-Architecture
arrays	I-Architecture
(	O
FPGAs	B-Architecture
)	O
.	O
</s>
<s>
It	O
is	O
supported	O
by	O
Altera	O
's	O
MAX-PLUS	O
and	O
Quartus	B-Language
series	O
of	O
design	O
software	O
.	O
</s>
<s>
AHDL	O
has	O
an	O
Ada-like	O
syntax	O
and	O
its	O
feature	O
set	O
is	O
comparable	O
to	O
the	O
synthesizable	O
portions	O
of	O
the	O
Verilog	B-Language
and	O
VHDL	B-Language
hardware	O
description	O
languages	O
.	O
</s>
<s>
In	O
contrast	O
to	O
HDLs	O
such	O
as	O
Verilog	B-Language
and	O
VHDL	B-Language
,	O
AHDL	O
is	O
a	O
design-entry	O
language	O
only	O
;	O
all	O
of	O
its	O
language	O
constructs	O
are	O
synthesizable	O
.	O
</s>
