HP-28C/S
![HP-28C/S](https://www.hpmuseum.org/3qs/28c3q.jpg)
![](https://i.redd.it/uxym1x3kuw161.jpg)
New Calc Friday! HP 28C, the first calculator capable of symbolic operations. : r/calculators
![](https://www.hpmuseum.org/img/28cm.jpg)
HP-28C/S
Hewlett-Packard HP-28S Handheld Electronic Calculator
![](https://i.redd.it/nos-nip-hewlett-packard-hp-28c-from-1987-v0-2v043jdyevpb1.jpg?width=1290&format=pjpg&auto=webp&s=3fd5f376d135a190f1d5aadff96171512258f706)
NOS/NIP Hewlett-Packard HP-28C from 1987! : r/calculators
![](https://images.squarespace-cdn.com/content/v1/54c2ea1ae4b039d95906d662/1425506150523-18J0TU46PP0NDNV0RRCA/hp28.png?format=1000w)
HP 28 Tri-color Original Ink Cartridge — dbm Computers
![](https://i.redd.it/nos-nip-hewlett-packard-hp-28c-from-1987-v0-aszs1idyevpb1.jpg?width=4032&format=pjpg&auto=webp&s=1fdb338d92ee815ef77ea0b7d29544427691ea2b)
NOS/NIP Hewlett-Packard HP-28C from 1987! : r/calculators
![](https://i.ebayimg.com/images/g/XzcAAOSw5MFkD6pi/s-l1200.webp)
Lot of 2 Vintage Calculators Ti 58C, case and Master, HP 28C for parts/repair
![](https://i.ytimg.com/vi/G3QAJYd7mnI/hq720.jpg?sqp=-oaymwEhCK4FEIIDSFryq4qpAxMIARUAAAAAGAElAADIQj0AgKJD&rs=AOn4CLAxcvsRuEaC-hvIpP85LSMkIvP1xQ)
1 kilosubscriber celebration with the mighty hp 28S
![](https://i.ebayimg.com/images/g/SVEAAOSwYEpixyTy/s-l1600.jpg)
HP 28S Scientific Calculator for sale online
![](https://i.ebayimg.com/images/g/wVYAAOSwY8hlcQXn/s-l1600.jpg)
HP 28S Scientific Calculator for sale online
![](https://www.picclickimg.com/MrEAAOSwGLRlbMMx/hp-28s-calculatrice-pocket-programmable-computer.webp)
HP 28S HP 28 S Advance Scientific Calculatrice Calculatrice *85 EUR 79,00 - PicClick FR
![](https://i.ebayimg.com/images/g/GkkAAOSwKHNlpxq4/s-l225.jpg)
HP Hewlett Packard 28s Advanced Scientific Calculator for sale online