Legacy terminal automation, green screens, modernized
A managed AI agent that operates your legacy and green-screen terminal systems — AS/400, mainframe, and old line-of-business apps — reading screens and entering data, so decades-old systems connect to your modern stack.
The system that's older than the team
A green-screen terminal still runs core operations, and only a few people know how to drive it. Every transaction is keyed by hand, nothing connects to your modern tools, and the institutional knowledge is walking toward retirement.
- Core work keyed into a green-screen terminal by hand.
- Only a few long-tenured staff know how to operate it.
- No way to connect the legacy system to modern tools.
- Data re-entered between the terminal and everything else.
As a IT / Systems Owner, I need to connect a legacy terminal system to our modern stack.
As a Operations Manager, I need to reduce manual data entry into the green screen.
As a Owner / Founder, I need to de-risk knowledge locked in a legacy system.
What the agent does
We map the terminal workflows your staff run, then build an agent that drives the green screen the same way — and co-manage it so the knowledge isn't trapped in a few heads.
- 01
Connect to the terminal
The agent operates the legacy or terminal interface — green screen, AS/400, or mainframe.
- 02
Read the screens
It reads records and fields from the terminal display reliably.
- 03
Key the transactions
It enters data and runs transactions exactly as your staff do today.
- 04
Bridge to modern systems
Data flows between the legacy system and your modern tools, both ways.
- 05
Flag the exceptions
Errors or unexpected screens route to a person with context.
Wires into
- Green-screen / terminal systems
- AS/400 & mainframe apps
- Your modern systems
- Email & storage
What it does
- Terminal screen reading
- Transaction entry
- Two-way data bridging
- Exception handling
What's included
- Terminal workflow mapping
- Legacy automation build
- Credential vaulting
- Exception monitoring & break/fix
We modernize around legacy systems for operations-heavy businesses. A verified win:
Our drivers were running empty 35% of the time because dispatch was building routes by gut feel and nobody was tracking backhaul opportunities. ThunderStaff built a load matching system that matches empty trucks to available freight by lane, rate, and equipment type, auto-generates rate confirmations, and tracks backhaul fill rate by driver. Empty miles dropped to 18%. We added $280K in annual revenue without buying a single new truck.
Legacy terminals are reliable but labor-intensive, and the people who know them are scarce. An agent that operates the terminal recovers that labor and captures the workflow so it's no longer trapped in a few heads.
Run the numbers in the ROI calculatorRelated automations
Questions, answered
Can you automate an AS/400 or mainframe green screen?
Yes. The agent operates the terminal interface directly — reading screens and keying transactions — so legacy systems with no modern integration can still be automated and bridged to your stack.
Will it connect the legacy system to our modern tools?
Yes. A core part of the build is bridging data both ways between the terminal system and your modern systems.
What about the knowledge only a few people have?
Mapping the workflow captures that institutional knowledge into the agent, reducing your dependence on a handful of long-tenured staff.
How fast can it go live?
Most builds go from process mapping to a live agent in days, starting with a free Process Blueprint.
Bring your green screens into the present
Start with a free Process Blueprint: we map your terminal workflow and scope an agent to operate it — no commitment.