exists and is an alternate of . There are 32 letters in the full Greek Alphabet. They have been used since in the 8th to 9th century BCE. There are 32 letters in the full Greek Alphabet. They have been used since in the 8th to 9th century BCE. alpha, beta, gamma, delta, epsilon, digamma, stigma, zeta, heta, eta, theta, iota, yot, kappa, lamda, mu, nu, xi, omicron, pi, san, koppa, rho, sigma, tau, upsilon, phi, chi, psi, omega, sampi, sho. Source:
Dangerous and malicious file type. The sys file extension is associated with system files, which contain code needed to properly load and configure Windows and were also used in MS-DOS system. The sys files can also be part of hardware drivers and contain various instruction for their flawless operation.
Versions of MS-DOS, PC DOS or DR-DOS contain a file called variously  IO.SYS ,  IBMBIO.COM , IBMBIO.SYS, or  DRBIOS.SYS ; this file is known as the  DOS BIOS  (also known as  DOS I/O System ) and contains the lower-level hardware-specific part of the operating system.