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- Strategic Partnerships
  Our team has all of the qualifications that you would expect from a modern IT support company.
- Service Areas
  Checksum Systems believes Managed IT Services should be comprehensive to best address all of your GTA business’ needs.
IT Services
- Managed IT Services
  Searching for a new managed IT services company in the Greater Toronto Area?
- Help Desk Services
  Checksum Systems is your trusted helpdesk in Toronto.
- IT Projects & Support
  Checksum Systems is here to help your Toronto business IT department with special IT projects and support.
- IT & Network Security
  With cyber-attacks happening on an almost daily basis, a company’s valuable information is at risk.
- Cloud Services
  CheckSum provides its clients an extremely simple way to access a multitude of different services over the internet.
- Business VoIP Services
  VoIP is increasingly becoming the first choice for companies because of its numerous benefits.
- Business Continuity
  Checksum ensures your business data is properly backed up.
Our Clients
- Law Firms
  Checksum Systems has legal firm IT expertise and will optimize your IT assets.
- Healthcare
  The expert technicians at Checksum Systems specialize in the intricacies of healthcare IT.
- Warehousing & Distribution
  Complete IT management from Checksum Systems gives your distribution and warehousing operation a competitive advantage.
- Small/Medium Businesses
  The Checksum team is professional, dependable, and customer-centric.
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Checksum Systems Inc. is now ISM Grid Corp.

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