co.efficient is written in FileMaker and is entirely cross platform. It can be run on a Mac or PC server with Mac or PC clients. The information on the right shows the recommended minimum system requirements.

Mac users
Server Dedicated machine running Mac OS X v10.4.11 or 10.5, Mac OS X Server v10.4.11 or 10.5, Processor: G4 1 GHz or higher (G5 recommended), RAM: 512 MB (1GB or more recommended), Hard Disk: 5 GB of available disk space.
Network Ethernet network running TCP/IP. Because some DHCP servers cycle IP addresses, FileMaker recommends using a static IP address.
Client Apple G4 or higher (no G3 upgrade cards), 512MB of RAM (1GB or more recommended if using multiple creative packages), CD-ROM drive and hard disk drive, Mac OS X v10.4.11 or 10.5.
 
PC users
Server Dedicated machine running Windows 2003 Server Standard Edition (Service Pack 1 installed) or Windows Vista. Processor: Pentium 4 2GHz or higher, RAM: 512 MB (1GB or more recommended), Hard Disk: 5 GB of available disk space.
Network Ethernet network running TCP/IP. Because some DHCP servers cycle IP addresses, FileMaker recommends using a static IP address.
Client Pentium III, Windows XP (Service Pack 2) or Windows Vista. 1 GHz or higher, 256MB of RAM, CD-ROM drive and hard disk drive.