The IBM ThinkPad 385XD was released in May 1998. It came with a 266 MHz Pentium II processor with hard disk drive capacities of 2.1 GB, 3.2 GB, 4 GB and 5.1 GB. The amount of memory that came standard with 16 MB/32 MB of memory and the maximum amount of memory that it can support is 80 MB/96 MB.
The ThinkPad 385XD is capable of running Windows 95 OEM Service Release 2.x, Windows 98, Windows 98 Second Edition, Windows 2000 and Windows Millennium Edition as well as OS/2 Warp 4 and eComStation.
Windows 95 introduced the basic elements of the interface, including the taskbar, Start button and menu as well as the Windows Explorer file manager and remained fundamentally unchanged in later versions of Windows. Windows 95 included support for 255-character ANSI mixed-cased long file names and support for 32-bit applications. Windows 95 fully incorporated MS-DOS (starting with version 7) into a consolidated operating system and marked a wider acceptance of Plug and Play standards on the platform.
The differences between Windows 95 and Windows NT are:
1. Windows 95 is a hybrid 16/32-bit operating system (released in August 1995) and was based on MS-DOS. The original release and OEM Service Release 1 only supported the FAT file system while OSR 2.x supported FAT32 in which it included support for hard drives larger than 2 GB and had the ability to format it as a single partition. The downside is that Windows 95 did not support hard drives larger than 32 GB without making several architectural changes that are not economically justifiable.
2. Windows NT 4.0, a 32-bit Windows operating system, which included Workstation, Server, Server Enterprise, Terminal Server and Embedded (NTe) editions are based on the Windows NT line and has a graphical environment similar to that of Windows 95. NT 4.0 included the ability to format a hard drive as a FAT partition, but with capacities up to 16 GB with 256 KB clusters and had support for NTFS volumes up to 16 TB with tweaking them up to 256 TB with 64 KB clusters. The downside is that the original release of Windows NT 4.0 will not support hard drives larger than 8.4 GB (7.88 GB binary) upon install without applying the Service Pack 4 update.
Microsoft was notorious to announce in late March 2003 that they wouldn't apply an important security update regarding to the Remote Procedure Call (RPC) flaw which affected NT 4.0 due to its architectural limitations. The patches were also made available for Windows 2000 and Windows XP.
But the architectural limitations of NT 4.0 made it infeasible to rebuild the software for the operating system and it would require rearchitecting a very significant amount of the OS not just the RPC component itself. Such a product after the architectural effort would be sufficiently incompatible with its own operating system and there would be no assurance that any of the software would continue to operate after the patch to remove the vulnerability has been applied.
Support for Windows 95 ended on 31 December 2001 and for Windows NT four years later.
So there is your story regarding the differences between Windows 95 and Windows NT 4.0.
For complete information on Windows 95 and Windows NT 4.0 read these Wikipedia articles in the source.