This question always crosses our mind when we are to apply for a new job. Usually people misunderstand all the four - resume, CV, bio data and cover letter to be the same. But in reality, all the four are quite different from each other. Approaching 100 professionals, probably, 90 will be wrong in their understanding of the differences of these 4. In this write up we shall explain in detail the meaning of each of these and provide tips on which of these to use in what kind of situation. This will mean you will be among those 10 in 100 who know the correct usage and meaning of a resume, curriculum vitae, bio data and cover letter! We shall start with the basic differences between the resume, CV, bio data and cover letter: Basic Definition - Resumes vs CV vs Bio Data vs Cover Letter Resume: Resume is a French word meaning \u201csummary\u201d. It is basically summarized form of qualifications, experience, skills and personal details of the writer. Curriculum Vitae: Curriculum Vitae (CV) is a Latin word meaning \u201ccourse of life\u201d. It consists of academic details along with experience attained, if any. It is an elaborated form of resume. Bio Data: Bio data is basically \u201cbiological description\u201d of a person. It involves details such as name, date of birth, hobbies, personal skills etc. of the author. Cover Letter: It is an introduction letter consisting information about oneself, related to job opening of candidate to the recruiter. Significance and Importance - Resumes vs CV vs Bio Data vs Cover Letter Resume: \tIt gives an idea to the recruiter, that whether the candidate is eligible for job or not. \tIt also helps the recruiter in identifying the designation which may suit the candidate. \tIt is used by professionals or experience holders. \tUsed where skills are given more preference, commonly for middle and senior level job. Curriculum Vitae: \tIt is a detailed form of resume. \tIt gives an idea to the recruiters about candidate\u2019s eligibility. \tIt is basically used by fresher or one seeking to change his\/her profile and for academic professionals. Bio Data: \tIt gives a brief description of personal detail of a person. \tIt is mostly preferred in government jobs in India. It is not an international concept of representing oneself professionally. \tBio data is also used for marriage purposes in India. \tIt gives an idea about a person\u2019s future behavior which may depend upon the past behavioral activity. Cover Letter: \tCover letter comprises of several documents used by an applicant to apply for job. \tIt is an introduction which may persuade the recruiter to take further decision, whether to go through other documents or not. \tIt expresses interest of applicant towards job profile. Format - Resumes vs CV vs Bio Data vs Cover Letter Resume: Includes experience of a candidate, qualification, achievements. Its length must not exceed 2-3 pages of A4 sheet. Curriculum Vitae: It includes academic and qualification details, career objectives, personal skills, technical skills, strength and weakness. Bio Data: It consists of personal details such as name, sex,\u00a0 date Of Birth, hobbies,\u00a0 interests,\u00a0 appearance, nationality, residence etc. Cover Letter: It includes the professional summary about a person such as name, contact information, work experience brief, career goals, expectation and aim of person related to job opening. This is mostly divided into 3 paragraphs: viz. introduction, Body and conclusion. Conclusion When professionalism is concerned, it is very important to present oneself in a proper manner. Whether Resume or CV or Bio data or a cover letter, all are considered for first impression of an applicant to the recruiters. Hence it must always be designed in a proper manner. It is very necessary to understand the difference between the four for its proper designing. Remember, these are the door for your entrance in the professional world, so understand the differences as the line of variation between the four are very thin.