What is an HP1858-0054 transistor array?

[Mark KAHRS]

Just in case someone doesn't know this, you can look up any old HP part
(and now Agilent) at:

http://www.parts.agilent.com

In some cases they will show a picture.  If you lookup said part, you
will find this:

Part Number:  	 1858-0054
Description: 	Mod and Ser Nbr Reqd TRANSISTOR ARRAY 16-PIN PLSTC DIP
Price: 	$10.25
Quantity on Hand:
Item Status: 	Limited Supply - Contact Agilent
Item Type: 	Agilent Qualified Part

And, they list all products where they know it to be found.