OPRI.60 - OPtional RIght hand v.60
OPRI is a family of 4 layouts:
- ChKB (earliest prototype)
- OPRI.60 (final version)
This page will describe OPRI final layout OPRI.60.
Visit this page to see 3 other earlier layouts.
OPRI.60 — Overview
OPRI.60 is 6-layered keyboard layout intended to be used as a full left-handed keyboard with a possibility of right hand to be able to aid typing at any moment. Number 60 in the name is to resemble number of keys close to 60% keyboards.
OPRI.60 main features:
- Both solo-left-handed and two-handed modes are available at any time
- Frequency-based letter placement for one-handed typing speed (I reached 70 wpm)
- In left-handed mode all complex hotkeys (like Alt+Ctrl+P) are reachable
- It can be used with any ordinary keyboard, but preferably with 6KRO
- Layout is written with AutoHotKey language for Windows
Full layers description:
Impressions of usage
Overall OPRI.60 is EXTREMELY fun and productive to use as one-handed keyboard everywhere: browsing, Excel, CAD, etc. When needed to enter long lines of text – you simply add right hand to typing. Also 70 wpm one-handed typing makes you look like a super cool hacker, can’t deny that.
The only serious drawback is that OPRI.60 is not recommended to be used as a constant two-handed keyboard. Load between hands in two-handed mode is roughly 75/25, since most frequent keys are concentrated near left hand. I reached 90 wpm two-handed typing speed (which is more than enough for me), however after several month of working on OPRI, I noticed that my left hand was getting tired much faster than it was on QWERTY.
Russian layout that I developed for OPRI.60 has approx 50/50 hands load. It is not optimized for one-handed typing, still it can be used for that.
In the attachment are KbdEdit and Vim keymap files.