Do I need to purchase special or additional hardware for all client machines?
No, there is no need to purchase any additional hardware if your existing systems meet the recommended minimum specification of 2 GB RAM, dual core / current generation Celeron CPU, PXE boot capable LAN port.
The hardware supported by the My sCool Server is standard compliant hardware readily available in the market. If at all there is a need to scale your infrastructure, the hardware can be procured from your existing vendor(s). We strongly believe in the open source ecosystem and hence follow a zero vendor lock-in policy.