| Windows NT 3.5 | |
|---|---|
| Version of theWindows NT operating system | |
 | |
 Screenshot of Windows NT 3.5 | |
| Developer | Microsoft |
| Source model | Closed source |
| Released to manufacturing | September 21, 1994; 31 years ago (1994-09-21)[1] |
| Latest release | Service Pack 3 (3.5.807) / June 21, 1995; 30 years ago (1995-06-21)[1] |
| Marketing target | Business and Server |
| Supported platforms | IA-32,Alpha,MIPS,PowerPC[2] |
| Kernel type | Hybrid |
| Userland | Windows API,NTVDM,OS/2 1.x,POSIX.1 |
| License | Commercialproprietary software |
| Preceded by | Windows NT 3.1 (1993) |
| Succeeded by | Windows NT 3.51 (1995) |
| Support status | |
| Support ended on December 31, 2001 | |
Windows NT 3.5 is the second major release of theWindows NToperating system developed byMicrosoft, targeting the data server and personal workstation markets.[3] It was released on September 21, 1994, as the successor toWindows NT 3.1. One of the primary goals during its development was to improve the operating system's performance. As a result, the project wascodenamed "Daytona", after theDaytona International Speedway inDaytona Beach, Florida.[4] Windows NT 3.5 was succeeded byWindows NT 3.51, released in 1995.[5] Support and updates for Windows NT 3.5 was ended by Microsoft on December 31, 2001.
Windows NT 3.5 comes in two editions:NT Workstation andNT Server. They respectively replace theNT andNT Advanced Server editions ofWindows NT 3.1.[6] The Workstation edition allows only 10 concurrent clients to access the file server and does not support Mac clients.[7]
Windows NT 3.5 includes integratedWinsock and properTCP/IP support,[8]replacing the incomplete implementation of TCP/IP based on theAT&TUNIX System V "STREAMS" API found in Windows NT 3.1. TCP/IP and IPX/SPX stacks in Windows NT 3.5 are rewritten.[9]NetBIOS over TCP/IP (NetBT) support as a compatibility layer for TCP/IP was introduced as also the Microsoft DHCP andWINS clients and DHCP and WINS servers.[10][11]
Windows NT 3.5 can share files via theFile Transfer Protocol, and printers through theLine Printer Daemon protocol. It can act as aGopher,HTTP, orWAIS server,[12] and includesRemote Access Service for remote dial-up modem access to LAN services using eitherSLIP orPPP protocols.[13] TheResource Kit includes the first implementation ofMicrosoft DNS.[14]
Other new features in Windows NT 3.5 include support for theVFAT file system, allowing for long file names in FAT16 partitions,Object Linking and Embedding (OLE) version 2.0 and support forinput/output completion ports.[15] Microsoft updated thegraphical user interface to be more consistent with that ofWindows for Workgroups 3.11. NT 3.5 shows performance improvements over NT 3.1, and requires less memory.[5]
Windows NT 3.5 added support forATAPICD-ROM. Windows NT 3.5 also allegedly has support forISA PnP but it is not enabled by default.
A lack of drivers forPCMCIA cards limited NT 3.5's suitability for notebook computers.[12]
To install Windows NT 3.5 on a computer that has a sixth-generation or laterx86 processor,[16] one has to modify files on the installation files.[5]
In July 1995, Windows NT 3.5 with Service Pack 3 was rated by theNational Security Agency as complying withTrusted Computer System Evaluation Criteria (TCSEC) C2 criteria.[17]
In May 2020, the full source code for the second release candidate build (build 782.1) of Windows NT 3.5, along with source code for the originalXbox, leaked onto the Internet.[18]
The first release of Windows NT was larger and slower than expected, so the next major push was a project called "Daytona", named after the speedway in Florida. The main goals for this release were to reduce the size of the system, increase the speed of the system, and, of course, to make it more reliable.
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