Proteus Portable 8.8 [2021] Page

A portable application does not write configuration data or DLLs to the host computer’s registry or system folders. When you plug your USB drive into a library computer, a university lab PC, or an office workstation, you run exclusively from that drive.

Running virtual tests of circuits before physical prototyping. It is particularly valued for simulating microcontrollers (like Arduino or PIC) and seeing how they interact with other hardware in real-time. Proteus Portable 8.8

Renders the PCB in 3D to check for mechanical clearance and assembly. Note on "Portable" Versions A portable application does not write configuration data

The primary environment for drawing circuits and preparing them for simulation or PCB layout. ARES (PCB Layout): a university lab PC